/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 02:29:00,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 02:29:00,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 02:29:00,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 02:29:00,901 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-04-15 02:29:00,940 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 02:29:00,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 02:29:00,940 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 02:29:00,941 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 02:29:00,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 02:29:00,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 02:29:00,944 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 02:29:00,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 02:29:00,944 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 02:29:00,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 02:29:00,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 02:29:00,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 02:29:00,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 02:29:00,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 02:29:00,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 02:29:00,946 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 02:29:00,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 02:29:00,946 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 02:29:00,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 02:29:00,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 02:29:00,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 02:29:00,947 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 02:29:00,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 02:29:00,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 02:29:00,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 02:29:00,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 02:29:00,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 02:29:00,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 02:29:00,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 02:29:00,948 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 02:29:00,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 02:29:00,948 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 02:29:01,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 02:29:01,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 02:29:01,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 02:29:01,262 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 02:29:01,264 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 02:29:01,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl [2021-04-15 02:29:01,265 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl' [2021-04-15 02:29:01,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 02:29:01,311 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 02:29:01,313 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 02:29:01,313 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 02:29:01,313 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 02:29:01,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:29:01" (1/1) ... [2021-04-15 02:29:01,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:29:01" (1/1) ... [2021-04-15 02:29:01,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 02:29:01,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 02:29:01,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 02:29:01,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 02:29:01,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:29:01" (1/1) ... [2021-04-15 02:29:01,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:29:01" (1/1) ... [2021-04-15 02:29:01,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:29:01" (1/1) ... [2021-04-15 02:29:01,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:29:01" (1/1) ... [2021-04-15 02:29:01,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:29:01" (1/1) ... [2021-04-15 02:29:01,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:29:01" (1/1) ... [2021-04-15 02:29:01,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:29:01" (1/1) ... [2021-04-15 02:29:01,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 02:29:01,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 02:29:01,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 02:29:01,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 02:29:01,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:29:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 02:29:01,428 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 02:29:01,428 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 02:29:01,428 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 02:29:01,428 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 02:29:01,429 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 02:29:01,429 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 02:29:01,429 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 02:29:01,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 02:29:01,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 02:29:01,429 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 02:29:01,811 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 02:29:01,811 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-04-15 02:29:01,812 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-04-15 02:29:01,813 INFO L202 PluginConnector]: Adding new model unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:29:01 BoogieIcfgContainer [2021-04-15 02:29:01,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 02:29:01,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 02:29:01,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 02:29:01,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 02:29:01,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:29:01" (1/2) ... [2021-04-15 02:29:01,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18fadb68 and model type unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 02:29:01, skipping insertion in model container [2021-04-15 02:29:01,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:29:01" (2/2) ... [2021-04-15 02:29:01,821 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.bpl [2021-04-15 02:29:01,827 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 02:29:01,828 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 02:29:01,832 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 02:29:01,834 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 02:29:01,875 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-04-15 02:29:01,889 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-04-15 02:29:01,917 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 02:29:01,917 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 02:29:01,917 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 02:29:01,917 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 02:29:01,917 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 02:29:01,918 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 02:29:01,918 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 02:29:01,918 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 02:29:01,927 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-04-15 02:29:01,935 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-04-15 02:29:01,942 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:01,942 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:01,942 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:01,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:01,947 INFO L82 PathProgramCache]: Analyzing trace with hash -163389209, now seen corresponding path program 1 times [2021-04-15 02:29:01,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:01,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305269105] [2021-04-15 02:29:01,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:02,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305269105] [2021-04-15 02:29:02,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:29:02,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 02:29:02,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942780498] [2021-04-15 02:29:02,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:29:02,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:02,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:29:02,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:29:02,112 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:02,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:02,145 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-04-15 02:29:02,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 02:29:02,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-04-15 02:29:02,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:02,153 INFO L225 Difference]: With dead ends: 26 [2021-04-15 02:29:02,154 INFO L226 Difference]: Without dead ends: 18 [2021-04-15 02:29:02,155 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:29:02,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-04-15 02:29:02,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-04-15 02:29:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:02,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-04-15 02:29:02,178 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-04-15 02:29:02,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:02,178 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-04-15 02:29:02,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:02,178 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-04-15 02:29:02,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-04-15 02:29:02,179 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:02,179 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:02,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 02:29:02,179 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:02,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:02,180 INFO L82 PathProgramCache]: Analyzing trace with hash 580194151, now seen corresponding path program 2 times [2021-04-15 02:29:02,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:02,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736317675] [2021-04-15 02:29:02,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:02,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736317675] [2021-04-15 02:29:02,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:29:02,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 02:29:02,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731704782] [2021-04-15 02:29:02,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:29:02,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:02,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:29:02,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:29:02,229 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:02,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:02,254 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-04-15 02:29:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:29:02,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-04-15 02:29:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:02,255 INFO L225 Difference]: With dead ends: 28 [2021-04-15 02:29:02,255 INFO L226 Difference]: Without dead ends: 23 [2021-04-15 02:29:02,256 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:29:02,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-04-15 02:29:02,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-04-15 02:29:02,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:02,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-04-15 02:29:02,260 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-04-15 02:29:02,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:02,260 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-04-15 02:29:02,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:02,260 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-04-15 02:29:02,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-15 02:29:02,261 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:02,261 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:02,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 02:29:02,261 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:02,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:02,262 INFO L82 PathProgramCache]: Analyzing trace with hash -824603045, now seen corresponding path program 1 times [2021-04-15 02:29:02,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:02,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708931097] [2021-04-15 02:29:02,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:02,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708931097] [2021-04-15 02:29:02,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510806552] [2021-04-15 02:29:02,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:02,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:29:02,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:02,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 02:29:02,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:02,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:02,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:02,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-04-15 02:29:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:02,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:02,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-04-15 02:29:02,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162531174] [2021-04-15 02:29:02,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:02,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:02,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:02,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:02,734 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:02,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:02,814 INFO L93 Difference]: Finished difference Result 30 states and 51 transitions. [2021-04-15 02:29:02,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 02:29:02,815 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-04-15 02:29:02,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:02,817 INFO L225 Difference]: With dead ends: 30 [2021-04-15 02:29:02,817 INFO L226 Difference]: Without dead ends: 22 [2021-04-15 02:29:02,823 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 153.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:02,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-04-15 02:29:02,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-04-15 02:29:02,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:02,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-04-15 02:29:02,833 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-04-15 02:29:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:02,833 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-04-15 02:29:02,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:02,834 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-04-15 02:29:02,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-15 02:29:02,834 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:02,834 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:03,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-04-15 02:29:03,057 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:03,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:03,058 INFO L82 PathProgramCache]: Analyzing trace with hash -81019685, now seen corresponding path program 2 times [2021-04-15 02:29:03,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:03,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477715314] [2021-04-15 02:29:03,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:03,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477715314] [2021-04-15 02:29:03,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096346364] [2021-04-15 02:29:03,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:03,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:03,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:03,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:29:03,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:03,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 02:29:03,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:03,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:03,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-04-15 02:29:03,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:29:03,295 INFO L628 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2021-04-15 02:29:03,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:03,297 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-04-15 02:29:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:03,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:03,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-04-15 02:29:03,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382050770] [2021-04-15 02:29:03,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:03,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:03,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:03,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:03,362 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:03,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:03,432 INFO L93 Difference]: Finished difference Result 35 states and 68 transitions. [2021-04-15 02:29:03,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:29:03,432 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-04-15 02:29:03,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:03,433 INFO L225 Difference]: With dead ends: 35 [2021-04-15 02:29:03,433 INFO L226 Difference]: Without dead ends: 30 [2021-04-15 02:29:03,433 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:03,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-04-15 02:29:03,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-04-15 02:29:03,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:03,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-04-15 02:29:03,437 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-04-15 02:29:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:03,437 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-04-15 02:29:03,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:03,437 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-04-15 02:29:03,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-15 02:29:03,437 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:03,437 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:03,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:03,660 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:03,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:03,660 INFO L82 PathProgramCache]: Analyzing trace with hash 770124447, now seen corresponding path program 3 times [2021-04-15 02:29:03,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:03,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653392239] [2021-04-15 02:29:03,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:03,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653392239] [2021-04-15 02:29:03,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524885618] [2021-04-15 02:29:03,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:03,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 02:29:03,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:03,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:29:03,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:03,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 02:29:03,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:03,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:03,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-04-15 02:29:03,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:29:03,895 INFO L628 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2021-04-15 02:29:03,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:03,897 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-04-15 02:29:03,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:03,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:03,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-04-15 02:29:03,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900403604] [2021-04-15 02:29:03,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:03,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:03,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:03,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:03,954 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:04,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:04,104 INFO L93 Difference]: Finished difference Result 51 states and 88 transitions. [2021-04-15 02:29:04,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:29:04,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-04-15 02:29:04,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:04,105 INFO L225 Difference]: With dead ends: 51 [2021-04-15 02:29:04,105 INFO L226 Difference]: Without dead ends: 41 [2021-04-15 02:29:04,106 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 167.2ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:29:04,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-04-15 02:29:04,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-04-15 02:29:04,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:04,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-04-15 02:29:04,120 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 11 [2021-04-15 02:29:04,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:04,120 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-04-15 02:29:04,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:04,123 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-04-15 02:29:04,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-15 02:29:04,124 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:04,124 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:04,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:04,348 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:04,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:04,349 INFO L82 PathProgramCache]: Analyzing trace with hash 108860664, now seen corresponding path program 1 times [2021-04-15 02:29:04,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:04,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339148025] [2021-04-15 02:29:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:04,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339148025] [2021-04-15 02:29:04,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:29:04,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:29:04,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72372247] [2021-04-15 02:29:04,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:29:04,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:04,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:29:04,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:29:04,375 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:04,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:04,393 INFO L93 Difference]: Finished difference Result 29 states and 52 transitions. [2021-04-15 02:29:04,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 02:29:04,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-04-15 02:29:04,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:04,394 INFO L225 Difference]: With dead ends: 29 [2021-04-15 02:29:04,394 INFO L226 Difference]: Without dead ends: 29 [2021-04-15 02:29:04,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:29:04,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-04-15 02:29:04,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-04-15 02:29:04,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:04,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-04-15 02:29:04,397 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-04-15 02:29:04,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:04,397 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-04-15 02:29:04,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:04,397 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-04-15 02:29:04,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 02:29:04,397 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:04,398 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:04,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-04-15 02:29:04,398 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:04,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:04,398 INFO L82 PathProgramCache]: Analyzing trace with hash 152604519, now seen corresponding path program 4 times [2021-04-15 02:29:04,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:04,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252405659] [2021-04-15 02:29:04,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:04,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252405659] [2021-04-15 02:29:04,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487460492] [2021-04-15 02:29:04,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:04,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:04,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:04,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:29:04,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:04,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:04,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-04-15 02:29:04,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:04,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:04,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:04,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-04-15 02:29:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:04,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:04,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-04-15 02:29:04,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357649881] [2021-04-15 02:29:04,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:04,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:04,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:04,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:04,637 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:04,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:04,698 INFO L93 Difference]: Finished difference Result 39 states and 72 transitions. [2021-04-15 02:29:04,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 02:29:04,699 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-04-15 02:29:04,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:04,699 INFO L225 Difference]: With dead ends: 39 [2021-04-15 02:29:04,699 INFO L226 Difference]: Without dead ends: 34 [2021-04-15 02:29:04,699 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:04,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-04-15 02:29:04,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-04-15 02:29:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:04,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2021-04-15 02:29:04,702 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 12 [2021-04-15 02:29:04,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:04,703 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2021-04-15 02:29:04,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:04,703 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2021-04-15 02:29:04,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 02:29:04,704 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:04,704 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:04,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:04,913 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:04,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:04,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1747332011, now seen corresponding path program 5 times [2021-04-15 02:29:04,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:04,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187759878] [2021-04-15 02:29:04,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:04,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187759878] [2021-04-15 02:29:04,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626850545] [2021-04-15 02:29:04,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:04,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:04,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:04,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 02:29:04,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:05,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:05,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-04-15 02:29:05,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:05,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:05,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:05,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-04-15 02:29:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:05,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:05,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-04-15 02:29:05,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004226031] [2021-04-15 02:29:05,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:05,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:05,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:05,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:05,124 INFO L87 Difference]: Start difference. First operand 32 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:05,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:05,196 INFO L93 Difference]: Finished difference Result 50 states and 85 transitions. [2021-04-15 02:29:05,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:29:05,197 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-04-15 02:29:05,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:05,198 INFO L225 Difference]: With dead ends: 50 [2021-04-15 02:29:05,198 INFO L226 Difference]: Without dead ends: 45 [2021-04-15 02:29:05,198 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:05,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-04-15 02:29:05,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2021-04-15 02:29:05,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:05,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2021-04-15 02:29:05,205 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 12 [2021-04-15 02:29:05,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:05,205 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2021-04-15 02:29:05,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:05,206 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2021-04-15 02:29:05,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 02:29:05,207 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:05,207 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:05,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-04-15 02:29:05,430 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:05,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:05,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1086068228, now seen corresponding path program 1 times [2021-04-15 02:29:05,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:05,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407560375] [2021-04-15 02:29:05,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:05,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407560375] [2021-04-15 02:29:05,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198344549] [2021-04-15 02:29:05,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:05,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 02:29:05,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:05,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:05,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-04-15 02:29:05,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035209878] [2021-04-15 02:29:05,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 02:29:05,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:05,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 02:29:05,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:29:05,521 INFO L87 Difference]: Start difference. First operand 32 states and 60 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:05,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:05,557 INFO L93 Difference]: Finished difference Result 58 states and 102 transitions. [2021-04-15 02:29:05,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 02:29:05,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-04-15 02:29:05,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:05,559 INFO L225 Difference]: With dead ends: 58 [2021-04-15 02:29:05,559 INFO L226 Difference]: Without dead ends: 58 [2021-04-15 02:29:05,559 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:29:05,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-04-15 02:29:05,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-04-15 02:29:05,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 64 transitions. [2021-04-15 02:29:05,562 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 64 transitions. Word has length 12 [2021-04-15 02:29:05,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:05,562 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 64 transitions. [2021-04-15 02:29:05,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:05,562 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 64 transitions. [2021-04-15 02:29:05,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 02:29:05,563 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:05,563 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:05,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:05,777 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:05,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:05,777 INFO L82 PathProgramCache]: Analyzing trace with hash -974791574, now seen corresponding path program 2 times [2021-04-15 02:29:05,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:05,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162543356] [2021-04-15 02:29:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:05,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162543356] [2021-04-15 02:29:05,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237149011] [2021-04-15 02:29:05,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:05,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:05,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:05,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 02:29:05,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:05,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:05,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-04-15 02:29:05,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218110704] [2021-04-15 02:29:05,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 02:29:05,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:05,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 02:29:05,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:29:05,874 INFO L87 Difference]: Start difference. First operand 33 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:05,929 INFO L93 Difference]: Finished difference Result 44 states and 85 transitions. [2021-04-15 02:29:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:29:05,929 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-04-15 02:29:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:05,929 INFO L225 Difference]: With dead ends: 44 [2021-04-15 02:29:05,930 INFO L226 Difference]: Without dead ends: 44 [2021-04-15 02:29:05,930 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:29:05,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-04-15 02:29:05,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-04-15 02:29:05,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:05,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 70 transitions. [2021-04-15 02:29:05,933 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 70 transitions. Word has length 12 [2021-04-15 02:29:05,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:05,933 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 70 transitions. [2021-04-15 02:29:05,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:05,934 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 70 transitions. [2021-04-15 02:29:05,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:29:05,938 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:05,938 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:06,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:06,145 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:06,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:06,145 INFO L82 PathProgramCache]: Analyzing trace with hash 381267931, now seen corresponding path program 6 times [2021-04-15 02:29:06,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:06,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091585764] [2021-04-15 02:29:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:06,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091585764] [2021-04-15 02:29:06,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413448265] [2021-04-15 02:29:06,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:06,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:29:06,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:06,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 02:29:06,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:06,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:06,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-04-15 02:29:06,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869551096] [2021-04-15 02:29:06,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:29:06,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:06,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:29:06,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:29:06,241 INFO L87 Difference]: Start difference. First operand 35 states and 70 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:06,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:06,280 INFO L93 Difference]: Finished difference Result 67 states and 115 transitions. [2021-04-15 02:29:06,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:29:06,281 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:29:06,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:06,281 INFO L225 Difference]: With dead ends: 67 [2021-04-15 02:29:06,281 INFO L226 Difference]: Without dead ends: 67 [2021-04-15 02:29:06,281 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:29:06,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-04-15 02:29:06,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 35. [2021-04-15 02:29:06,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:06,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 72 transitions. [2021-04-15 02:29:06,285 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 72 transitions. Word has length 13 [2021-04-15 02:29:06,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:06,285 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 72 transitions. [2021-04-15 02:29:06,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:06,285 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 72 transitions. [2021-04-15 02:29:06,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:29:06,286 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:06,286 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:06,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-04-15 02:29:06,505 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:06,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:06,505 INFO L82 PathProgramCache]: Analyzing trace with hash 462398216, now seen corresponding path program 3 times [2021-04-15 02:29:06,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:06,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120876327] [2021-04-15 02:29:06,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:06,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120876327] [2021-04-15 02:29:06,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126447142] [2021-04-15 02:29:06,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:06,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 02:29:06,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:06,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 02:29:06,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:06,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:06,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-04-15 02:29:06,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928130711] [2021-04-15 02:29:06,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:29:06,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:06,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:29:06,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:29:06,603 INFO L87 Difference]: Start difference. First operand 35 states and 72 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:06,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:06,670 INFO L93 Difference]: Finished difference Result 80 states and 140 transitions. [2021-04-15 02:29:06,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:29:06,670 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:29:06,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:06,671 INFO L225 Difference]: With dead ends: 80 [2021-04-15 02:29:06,671 INFO L226 Difference]: Without dead ends: 77 [2021-04-15 02:29:06,671 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:06,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-04-15 02:29:06,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 40. [2021-04-15 02:29:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:06,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 85 transitions. [2021-04-15 02:29:06,675 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 85 transitions. Word has length 13 [2021-04-15 02:29:06,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:06,675 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 85 transitions. [2021-04-15 02:29:06,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:06,676 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 85 transitions. [2021-04-15 02:29:06,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:29:06,676 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:06,676 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:06,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:06,877 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:06,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:06,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1975995423, now seen corresponding path program 7 times [2021-04-15 02:29:06,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:06,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116437517] [2021-04-15 02:29:06,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:06,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116437517] [2021-04-15 02:29:06,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329608393] [2021-04-15 02:29:06,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:06,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 02:29:06,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:06,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:06,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-04-15 02:29:06,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664883877] [2021-04-15 02:29:06,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:29:06,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:06,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:29:06,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:29:06,971 INFO L87 Difference]: Start difference. First operand 40 states and 85 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:07,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:07,022 INFO L93 Difference]: Finished difference Result 51 states and 98 transitions. [2021-04-15 02:29:07,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:29:07,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:29:07,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:07,023 INFO L225 Difference]: With dead ends: 51 [2021-04-15 02:29:07,023 INFO L226 Difference]: Without dead ends: 49 [2021-04-15 02:29:07,023 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:07,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-04-15 02:29:07,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-04-15 02:29:07,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:07,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 84 transitions. [2021-04-15 02:29:07,036 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 84 transitions. Word has length 13 [2021-04-15 02:29:07,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:07,037 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 84 transitions. [2021-04-15 02:29:07,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:07,037 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 84 transitions. [2021-04-15 02:29:07,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:29:07,040 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:07,040 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:07,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:07,253 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:07,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:07,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1314731640, now seen corresponding path program 4 times [2021-04-15 02:29:07,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:07,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609945438] [2021-04-15 02:29:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:07,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609945438] [2021-04-15 02:29:07,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21571321] [2021-04-15 02:29:07,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:07,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:07,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:07,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 02:29:07,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:07,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:07,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-04-15 02:29:07,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464777099] [2021-04-15 02:29:07,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:29:07,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:07,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:29:07,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:29:07,363 INFO L87 Difference]: Start difference. First operand 40 states and 84 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:07,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:07,406 INFO L93 Difference]: Finished difference Result 68 states and 122 transitions. [2021-04-15 02:29:07,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:29:07,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:29:07,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:07,407 INFO L225 Difference]: With dead ends: 68 [2021-04-15 02:29:07,407 INFO L226 Difference]: Without dead ends: 68 [2021-04-15 02:29:07,407 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:29:07,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-04-15 02:29:07,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 38. [2021-04-15 02:29:07,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:07,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 76 transitions. [2021-04-15 02:29:07,415 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 76 transitions. Word has length 13 [2021-04-15 02:29:07,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:07,416 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 76 transitions. [2021-04-15 02:29:07,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:07,416 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 76 transitions. [2021-04-15 02:29:07,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:29:07,416 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:07,416 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:07,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-04-15 02:29:07,633 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:07,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:07,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1703307557, now seen corresponding path program 8 times [2021-04-15 02:29:07,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:07,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776842271] [2021-04-15 02:29:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:07,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776842271] [2021-04-15 02:29:07,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586713566] [2021-04-15 02:29:07,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:07,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:07,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:07,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 02:29:07,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:07,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:07,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-04-15 02:29:07,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543561325] [2021-04-15 02:29:07,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:29:07,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:07,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:29:07,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:29:07,730 INFO L87 Difference]: Start difference. First operand 38 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:07,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:07,772 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2021-04-15 02:29:07,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:29:07,773 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:29:07,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:07,773 INFO L225 Difference]: With dead ends: 51 [2021-04-15 02:29:07,773 INFO L226 Difference]: Without dead ends: 47 [2021-04-15 02:29:07,775 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:07,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-04-15 02:29:07,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-04-15 02:29:07,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:07,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 75 transitions. [2021-04-15 02:29:07,780 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 75 transitions. Word has length 13 [2021-04-15 02:29:07,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:07,780 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 75 transitions. [2021-04-15 02:29:07,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:07,780 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 75 transitions. [2021-04-15 02:29:07,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:29:07,781 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:07,781 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:08,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-04-15 02:29:08,002 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:08,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:08,002 INFO L82 PathProgramCache]: Analyzing trace with hash -746128162, now seen corresponding path program 5 times [2021-04-15 02:29:08,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:08,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678463408] [2021-04-15 02:29:08,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:08,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678463408] [2021-04-15 02:29:08,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518278495] [2021-04-15 02:29:08,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:08,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:08,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:08,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 02:29:08,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:08,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:08,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-04-15 02:29:08,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925575434] [2021-04-15 02:29:08,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:29:08,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:08,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:29:08,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:29:08,112 INFO L87 Difference]: Start difference. First operand 38 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:08,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:08,161 INFO L93 Difference]: Finished difference Result 61 states and 111 transitions. [2021-04-15 02:29:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:29:08,161 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:29:08,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:08,162 INFO L225 Difference]: With dead ends: 61 [2021-04-15 02:29:08,162 INFO L226 Difference]: Without dead ends: 61 [2021-04-15 02:29:08,162 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:08,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-04-15 02:29:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2021-04-15 02:29:08,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:08,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 75 transitions. [2021-04-15 02:29:08,165 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 75 transitions. Word has length 13 [2021-04-15 02:29:08,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:08,165 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 75 transitions. [2021-04-15 02:29:08,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:08,165 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 75 transitions. [2021-04-15 02:29:08,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:29:08,166 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:08,166 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:08,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-04-15 02:29:08,385 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:08,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:08,385 INFO L82 PathProgramCache]: Analyzing trace with hash 202417055, now seen corresponding path program 9 times [2021-04-15 02:29:08,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:08,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272271882] [2021-04-15 02:29:08,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:08,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:08,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272271882] [2021-04-15 02:29:08,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:29:08,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 02:29:08,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739817198] [2021-04-15 02:29:08,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 02:29:08,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:08,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 02:29:08,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:29:08,424 INFO L87 Difference]: Start difference. First operand 38 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:08,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:08,440 INFO L93 Difference]: Finished difference Result 42 states and 79 transitions. [2021-04-15 02:29:08,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 02:29:08,441 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:29:08,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:08,441 INFO L225 Difference]: With dead ends: 42 [2021-04-15 02:29:08,441 INFO L226 Difference]: Without dead ends: 36 [2021-04-15 02:29:08,442 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:29:08,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-04-15 02:29:08,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-04-15 02:29:08,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:08,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 71 transitions. [2021-04-15 02:29:08,443 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 71 transitions. Word has length 13 [2021-04-15 02:29:08,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:08,444 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 71 transitions. [2021-04-15 02:29:08,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:08,444 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 71 transitions. [2021-04-15 02:29:08,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:29:08,444 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:08,444 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:08,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-04-15 02:29:08,444 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:08,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:08,445 INFO L82 PathProgramCache]: Analyzing trace with hash -208272584, now seen corresponding path program 6 times [2021-04-15 02:29:08,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:08,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373535789] [2021-04-15 02:29:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:08,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373535789] [2021-04-15 02:29:08,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307098264] [2021-04-15 02:29:08,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:08,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:29:08,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:08,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 02:29:08,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:08,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:08,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-04-15 02:29:08,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184252969] [2021-04-15 02:29:08,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:29:08,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:08,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:29:08,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:29:08,533 INFO L87 Difference]: Start difference. First operand 36 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:08,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:08,586 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2021-04-15 02:29:08,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:29:08,586 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-04-15 02:29:08,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:08,586 INFO L225 Difference]: With dead ends: 61 [2021-04-15 02:29:08,586 INFO L226 Difference]: Without dead ends: 61 [2021-04-15 02:29:08,587 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:08,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-04-15 02:29:08,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 41. [2021-04-15 02:29:08,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:08,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 83 transitions. [2021-04-15 02:29:08,588 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 83 transitions. Word has length 13 [2021-04-15 02:29:08,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:08,589 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 83 transitions. [2021-04-15 02:29:08,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:08,589 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 83 transitions. [2021-04-15 02:29:08,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:29:08,589 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:08,589 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:08,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:08,789 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:08,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:08,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1038970604, now seen corresponding path program 7 times [2021-04-15 02:29:08,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:08,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652092047] [2021-04-15 02:29:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:08,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652092047] [2021-04-15 02:29:08,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823668602] [2021-04-15 02:29:08,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:08,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:29:08,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:09,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:09,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:29:09,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:09,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:09,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:09,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-04-15 02:29:09,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:09,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:09,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 02:29:09,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514890027] [2021-04-15 02:29:09,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:09,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:09,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:09,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:09,099 INFO L87 Difference]: Start difference. First operand 41 states and 83 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:09,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:09,217 INFO L93 Difference]: Finished difference Result 56 states and 110 transitions. [2021-04-15 02:29:09,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:29:09,217 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:29:09,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:09,218 INFO L225 Difference]: With dead ends: 56 [2021-04-15 02:29:09,218 INFO L226 Difference]: Without dead ends: 46 [2021-04-15 02:29:09,219 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:09,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-04-15 02:29:09,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-04-15 02:29:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 87 transitions. [2021-04-15 02:29:09,221 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 87 transitions. Word has length 14 [2021-04-15 02:29:09,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:09,222 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 87 transitions. [2021-04-15 02:29:09,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 87 transitions. [2021-04-15 02:29:09,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:29:09,222 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:09,222 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:09,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 02:29:09,444 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:09,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:09,445 INFO L82 PathProgramCache]: Analyzing trace with hash -186637180, now seen corresponding path program 8 times [2021-04-15 02:29:09,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:09,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550211559] [2021-04-15 02:29:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:09,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550211559] [2021-04-15 02:29:09,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367607617] [2021-04-15 02:29:09,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:09,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:09,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:09,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:29:09,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:09,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:09,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:29:09,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:09,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:09,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:09,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-04-15 02:29:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:09,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:09,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 02:29:09,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609968630] [2021-04-15 02:29:09,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:09,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:09,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:09,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:09,733 INFO L87 Difference]: Start difference. First operand 43 states and 87 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:09,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:09,930 INFO L93 Difference]: Finished difference Result 70 states and 143 transitions. [2021-04-15 02:29:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:29:09,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:29:09,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:09,931 INFO L225 Difference]: With dead ends: 70 [2021-04-15 02:29:09,932 INFO L226 Difference]: Without dead ends: 56 [2021-04-15 02:29:09,932 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:09,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-04-15 02:29:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-04-15 02:29:09,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 102 transitions. [2021-04-15 02:29:09,934 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 102 transitions. Word has length 14 [2021-04-15 02:29:09,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:09,935 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 102 transitions. [2021-04-15 02:29:09,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:09,935 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 102 transitions. [2021-04-15 02:29:09,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:29:09,937 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:09,937 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:10,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:10,157 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:10,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:10,158 INFO L82 PathProgramCache]: Analyzing trace with hash 556946180, now seen corresponding path program 9 times [2021-04-15 02:29:10,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:10,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930142309] [2021-04-15 02:29:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:10,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930142309] [2021-04-15 02:29:10,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150901178] [2021-04-15 02:29:10,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:10,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:29:10,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:10,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:29:10,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:10,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:10,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-04-15 02:29:10,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:10,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:29:10,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:10,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:10,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:29:10,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:10,493 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-04-15 02:29:10,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:10,494 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-04-15 02:29:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:10,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:10,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 02:29:10,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34345662] [2021-04-15 02:29:10,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:10,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:10,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:10,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:10,525 INFO L87 Difference]: Start difference. First operand 47 states and 102 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:10,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:10,734 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2021-04-15 02:29:10,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:10,735 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:29:10,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:10,736 INFO L225 Difference]: With dead ends: 88 [2021-04-15 02:29:10,736 INFO L226 Difference]: Without dead ends: 78 [2021-04-15 02:29:10,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:10,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-04-15 02:29:10,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-04-15 02:29:10,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 102 transitions. [2021-04-15 02:29:10,742 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 102 transitions. Word has length 14 [2021-04-15 02:29:10,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:10,744 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 102 transitions. [2021-04-15 02:29:10,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:10,744 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 102 transitions. [2021-04-15 02:29:10,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:29:10,745 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:10,745 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:10,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:10,961 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:10,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:10,961 INFO L82 PathProgramCache]: Analyzing trace with hash 2047470314, now seen corresponding path program 10 times [2021-04-15 02:29:10,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:10,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162425384] [2021-04-15 02:29:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:11,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162425384] [2021-04-15 02:29:11,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138835776] [2021-04-15 02:29:11,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:11,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:11,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:11,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:29:11,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:11,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:11,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:29:11,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:11,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:11,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:11,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-04-15 02:29:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:11,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:11,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 02:29:11,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453960570] [2021-04-15 02:29:11,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:11,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:11,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:11,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:11,216 INFO L87 Difference]: Start difference. First operand 47 states and 102 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:11,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:11,394 INFO L93 Difference]: Finished difference Result 76 states and 163 transitions. [2021-04-15 02:29:11,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:29:11,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:29:11,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:11,395 INFO L225 Difference]: With dead ends: 76 [2021-04-15 02:29:11,395 INFO L226 Difference]: Without dead ends: 62 [2021-04-15 02:29:11,396 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 167.2ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-04-15 02:29:11,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2021-04-15 02:29:11,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 53 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:11,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 127 transitions. [2021-04-15 02:29:11,398 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 127 transitions. Word has length 14 [2021-04-15 02:29:11,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:11,398 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 127 transitions. [2021-04-15 02:29:11,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:11,399 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 127 transitions. [2021-04-15 02:29:11,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:29:11,399 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:11,399 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:11,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-04-15 02:29:11,621 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:11,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:11,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1503913622, now seen corresponding path program 11 times [2021-04-15 02:29:11,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:11,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433401599] [2021-04-15 02:29:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:11,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433401599] [2021-04-15 02:29:11,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609905754] [2021-04-15 02:29:11,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:11,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:29:11,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:11,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:29:11,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:11,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:11,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-04-15 02:29:11,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:11,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:29:11,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:11,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:11,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:29:11,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:11,949 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:29:11,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:11,950 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-04-15 02:29:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:11,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:11,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 02:29:11,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670079717] [2021-04-15 02:29:11,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:11,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:11,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:11,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:11,996 INFO L87 Difference]: Start difference. First operand 54 states and 127 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:12,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:12,211 INFO L93 Difference]: Finished difference Result 101 states and 211 transitions. [2021-04-15 02:29:12,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:12,211 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:29:12,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:12,212 INFO L225 Difference]: With dead ends: 101 [2021-04-15 02:29:12,212 INFO L226 Difference]: Without dead ends: 84 [2021-04-15 02:29:12,212 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 217.8ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:29:12,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-04-15 02:29:12,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2021-04-15 02:29:12,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:12,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 126 transitions. [2021-04-15 02:29:12,214 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 126 transitions. Word has length 14 [2021-04-15 02:29:12,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:12,214 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 126 transitions. [2021-04-15 02:29:12,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:12,215 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 126 transitions. [2021-04-15 02:29:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:29:12,215 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:12,215 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:12,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-04-15 02:29:12,425 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:12,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:12,425 INFO L82 PathProgramCache]: Analyzing trace with hash -652769490, now seen corresponding path program 12 times [2021-04-15 02:29:12,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:12,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110088776] [2021-04-15 02:29:12,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:12,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110088776] [2021-04-15 02:29:12,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148549715] [2021-04-15 02:29:12,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:12,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:29:12,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:12,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:29:12,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:12,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:12,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-04-15 02:29:12,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:12,718 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:29:12,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:12,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:12,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:29:12,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:12,761 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:29:12,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:12,762 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-04-15 02:29:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:12,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:12,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 02:29:12,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271152083] [2021-04-15 02:29:12,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:12,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:12,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:12,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:12,785 INFO L87 Difference]: Start difference. First operand 54 states and 126 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:12,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:12,970 INFO L93 Difference]: Finished difference Result 80 states and 179 transitions. [2021-04-15 02:29:12,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:29:12,970 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:29:12,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:12,971 INFO L225 Difference]: With dead ends: 80 [2021-04-15 02:29:12,971 INFO L226 Difference]: Without dead ends: 75 [2021-04-15 02:29:12,971 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:29:12,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-04-15 02:29:12,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-04-15 02:29:12,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:12,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 126 transitions. [2021-04-15 02:29:12,973 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 126 transitions. Word has length 14 [2021-04-15 02:29:12,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:12,973 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 126 transitions. [2021-04-15 02:29:12,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:12,973 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 126 transitions. [2021-04-15 02:29:12,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:29:12,974 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:12,974 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:13,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-04-15 02:29:13,181 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:13,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:13,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1709641404, now seen corresponding path program 13 times [2021-04-15 02:29:13,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:13,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119136176] [2021-04-15 02:29:13,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:13,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119136176] [2021-04-15 02:29:13,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488667548] [2021-04-15 02:29:13,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:13,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:29:13,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:13,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:13,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:29:13,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:13,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:13,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:13,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-04-15 02:29:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:13,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:13,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 02:29:13,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174195177] [2021-04-15 02:29:13,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:13,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:13,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:13,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:13,434 INFO L87 Difference]: Start difference. First operand 54 states and 126 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:13,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:13,616 INFO L93 Difference]: Finished difference Result 81 states and 183 transitions. [2021-04-15 02:29:13,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:29:13,616 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:29:13,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:13,617 INFO L225 Difference]: With dead ends: 81 [2021-04-15 02:29:13,617 INFO L226 Difference]: Without dead ends: 67 [2021-04-15 02:29:13,617 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:13,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-04-15 02:29:13,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-04-15 02:29:13,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:13,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-04-15 02:29:13,619 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-04-15 02:29:13,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:13,620 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-04-15 02:29:13,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-04-15 02:29:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:29:13,620 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:13,620 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:13,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:13,829 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:13,829 INFO L82 PathProgramCache]: Analyzing trace with hash -966058044, now seen corresponding path program 14 times [2021-04-15 02:29:13,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:13,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215171182] [2021-04-15 02:29:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:13,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215171182] [2021-04-15 02:29:13,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054977566] [2021-04-15 02:29:13,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:13,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:13,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:13,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:29:13,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:14,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:14,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-04-15 02:29:14,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:14,101 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:29:14,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:14,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:14,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:29:14,123 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:14,139 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-04-15 02:29:14,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:14,142 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-04-15 02:29:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:14,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:14,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 02:29:14,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266852092] [2021-04-15 02:29:14,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:14,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:14,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:14,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:14,172 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:14,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:14,452 INFO L93 Difference]: Finished difference Result 102 states and 228 transitions. [2021-04-15 02:29:14,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:14,452 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:29:14,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:14,453 INFO L225 Difference]: With dead ends: 102 [2021-04-15 02:29:14,453 INFO L226 Difference]: Without dead ends: 92 [2021-04-15 02:29:14,453 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:29:14,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-04-15 02:29:14,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 61. [2021-04-15 02:29:14,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-04-15 02:29:14,455 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-04-15 02:29:14,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:14,455 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-04-15 02:29:14,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:14,456 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-04-15 02:29:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:29:14,456 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:14,456 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:14,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:14,657 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:14,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:14,657 INFO L82 PathProgramCache]: Analyzing trace with hash -114913912, now seen corresponding path program 15 times [2021-04-15 02:29:14,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:14,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439551118] [2021-04-15 02:29:14,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:14,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:14,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439551118] [2021-04-15 02:29:14,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245211474] [2021-04-15 02:29:14,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:14,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:29:14,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:14,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:29:14,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:14,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:14,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-04-15 02:29:14,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:14,890 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:29:14,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:14,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:14,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:29:14,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:14,934 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-04-15 02:29:14,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:14,935 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-04-15 02:29:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:14,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:14,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 02:29:14,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177288869] [2021-04-15 02:29:14,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:14,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:14,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:14,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:14,973 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:15,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:15,203 INFO L93 Difference]: Finished difference Result 84 states and 193 transitions. [2021-04-15 02:29:15,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:29:15,204 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:29:15,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:15,204 INFO L225 Difference]: With dead ends: 84 [2021-04-15 02:29:15,204 INFO L226 Difference]: Without dead ends: 79 [2021-04-15 02:29:15,204 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:29:15,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-04-15 02:29:15,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2021-04-15 02:29:15,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:15,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-04-15 02:29:15,206 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-04-15 02:29:15,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:15,206 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-04-15 02:29:15,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:15,207 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-04-15 02:29:15,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:29:15,207 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:15,207 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:15,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-04-15 02:29:15,413 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:15,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:15,413 INFO L82 PathProgramCache]: Analyzing trace with hash 500750404, now seen corresponding path program 16 times [2021-04-15 02:29:15,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:15,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228200748] [2021-04-15 02:29:15,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:15,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228200748] [2021-04-15 02:29:15,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390175472] [2021-04-15 02:29:15,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:15,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:15,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:15,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:29:15,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:15,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:15,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-04-15 02:29:15,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:15,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:29:15,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:15,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:15,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:29:15,686 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:15,702 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:29:15,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:15,703 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-04-15 02:29:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:15,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:15,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 02:29:15,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484046757] [2021-04-15 02:29:15,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:15,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:15,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:15,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:15,731 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:15,987 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2021-04-15 02:29:15,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:29:15,987 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:29:15,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:15,988 INFO L225 Difference]: With dead ends: 96 [2021-04-15 02:29:15,988 INFO L226 Difference]: Without dead ends: 91 [2021-04-15 02:29:15,988 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 280.1ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:29:15,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-04-15 02:29:15,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 61. [2021-04-15 02:29:15,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:15,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-04-15 02:29:15,990 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-04-15 02:29:15,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:15,990 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-04-15 02:29:15,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-04-15 02:29:15,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:29:15,991 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:15,991 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:16,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:16,197 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:16,200 INFO L82 PathProgramCache]: Analyzing trace with hash 2078979626, now seen corresponding path program 17 times [2021-04-15 02:29:16,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:16,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846242925] [2021-04-15 02:29:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:16,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846242925] [2021-04-15 02:29:16,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067659419] [2021-04-15 02:29:16,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:16,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:29:16,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:16,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:29:16,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:16,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:16,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:29:16,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:16,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:16,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:16,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-04-15 02:29:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:16,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:16,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 02:29:16,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8318585] [2021-04-15 02:29:16,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:16,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:16,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:16,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:16,431 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:16,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:16,586 INFO L93 Difference]: Finished difference Result 89 states and 210 transitions. [2021-04-15 02:29:16,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:29:16,587 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:29:16,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:16,587 INFO L225 Difference]: With dead ends: 89 [2021-04-15 02:29:16,587 INFO L226 Difference]: Without dead ends: 75 [2021-04-15 02:29:16,588 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 161.3ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:16,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-04-15 02:29:16,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-04-15 02:29:16,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:16,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-04-15 02:29:16,590 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-04-15 02:29:16,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:16,590 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-04-15 02:29:16,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:16,590 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-04-15 02:29:16,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:29:16,590 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:16,590 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:16,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:16,801 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:16,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1472404310, now seen corresponding path program 18 times [2021-04-15 02:29:16,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:16,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126578862] [2021-04-15 02:29:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:16,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126578862] [2021-04-15 02:29:16,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656657558] [2021-04-15 02:29:16,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:16,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:29:16,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:16,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:29:16,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:17,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:17,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-04-15 02:29:17,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:17,051 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:29:17,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:17,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:17,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:29:17,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:17,089 INFO L628 ElimStorePlain]: treesize reduction 17, result has 46.9 percent of original size [2021-04-15 02:29:17,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:17,089 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-04-15 02:29:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:17,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:17,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 02:29:17,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634542008] [2021-04-15 02:29:17,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:17,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:17,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:17,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:17,117 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:17,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:17,333 INFO L93 Difference]: Finished difference Result 112 states and 263 transitions. [2021-04-15 02:29:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:29:17,334 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:29:17,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:17,334 INFO L225 Difference]: With dead ends: 112 [2021-04-15 02:29:17,334 INFO L226 Difference]: Without dead ends: 102 [2021-04-15 02:29:17,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:29:17,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-04-15 02:29:17,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-04-15 02:29:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:17,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-04-15 02:29:17,337 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-04-15 02:29:17,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:17,337 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-04-15 02:29:17,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:17,337 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-04-15 02:29:17,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:29:17,337 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:17,338 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:17,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-04-15 02:29:17,545 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:17,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:17,545 INFO L82 PathProgramCache]: Analyzing trace with hash -621260178, now seen corresponding path program 19 times [2021-04-15 02:29:17,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:17,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922783971] [2021-04-15 02:29:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:17,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922783971] [2021-04-15 02:29:17,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164813391] [2021-04-15 02:29:17,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:17,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:29:17,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:17,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:17,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-04-15 02:29:17,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:17,758 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:29:17,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:17,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:17,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:29:17,782 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:17,796 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:29:17,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:17,802 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-04-15 02:29:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:17,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:17,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 02:29:17,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61069112] [2021-04-15 02:29:17,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:17,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:17,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:17,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:17,830 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:17,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:17,982 INFO L93 Difference]: Finished difference Result 97 states and 233 transitions. [2021-04-15 02:29:17,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:29:17,983 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:29:17,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:17,983 INFO L225 Difference]: With dead ends: 97 [2021-04-15 02:29:17,983 INFO L226 Difference]: Without dead ends: 92 [2021-04-15 02:29:17,983 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 190.3ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:29:17,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-04-15 02:29:17,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 68. [2021-04-15 02:29:17,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-04-15 02:29:17,985 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-04-15 02:29:17,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:17,985 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-04-15 02:29:17,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:17,985 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-04-15 02:29:17,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:29:17,985 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:17,985 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:18,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-04-15 02:29:18,188 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:18,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:18,188 INFO L82 PathProgramCache]: Analyzing trace with hash -5595862, now seen corresponding path program 20 times [2021-04-15 02:29:18,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:18,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939477898] [2021-04-15 02:29:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:18,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939477898] [2021-04-15 02:29:18,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194019296] [2021-04-15 02:29:18,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:18,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:18,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:18,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:29:18,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:18,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:18,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-04-15 02:29:18,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:18,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:29:18,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:18,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:18,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:29:18,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:18,503 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:29:18,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:18,503 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-04-15 02:29:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:18,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:18,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 02:29:18,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006669278] [2021-04-15 02:29:18,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:18,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:18,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:18,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:18,526 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:18,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:18,772 INFO L93 Difference]: Finished difference Result 107 states and 254 transitions. [2021-04-15 02:29:18,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:29:18,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:29:18,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:18,773 INFO L225 Difference]: With dead ends: 107 [2021-04-15 02:29:18,773 INFO L226 Difference]: Without dead ends: 102 [2021-04-15 02:29:18,773 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 297.0ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:29:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-04-15 02:29:18,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-04-15 02:29:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-04-15 02:29:18,776 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-04-15 02:29:18,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:18,776 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-04-15 02:29:18,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:18,776 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-04-15 02:29:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:29:18,776 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:18,776 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:18,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-04-15 02:29:18,997 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:18,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:18,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1900128750, now seen corresponding path program 21 times [2021-04-15 02:29:18,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:18,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735391590] [2021-04-15 02:29:18,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:19,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735391590] [2021-04-15 02:29:19,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293771757] [2021-04-15 02:29:19,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:19,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:29:19,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:19,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 02:29:19,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:19,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:19,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-04-15 02:29:19,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:19,257 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:29:19,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:19,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:19,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-04-15 02:29:19,278 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:19,294 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-04-15 02:29:19,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:19,295 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-04-15 02:29:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:19,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:19,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 02:29:19,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677449697] [2021-04-15 02:29:19,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:19,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:19,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:19,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:19,321 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:19,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:19,635 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2021-04-15 02:29:19,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:19,635 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:29:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:19,636 INFO L225 Difference]: With dead ends: 112 [2021-04-15 02:29:19,636 INFO L226 Difference]: Without dead ends: 107 [2021-04-15 02:29:19,636 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:29:19,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-04-15 02:29:19,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2021-04-15 02:29:19,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.5652173913043477) internal successors, (177), 69 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2021-04-15 02:29:19,639 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 14 [2021-04-15 02:29:19,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:19,639 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2021-04-15 02:29:19,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:19,639 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2021-04-15 02:29:19,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:19,639 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:19,639 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:19,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-04-15 02:29:19,840 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:19,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:19,840 INFO L82 PathProgramCache]: Analyzing trace with hash -336763768, now seen corresponding path program 22 times [2021-04-15 02:29:19,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:19,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481210578] [2021-04-15 02:29:19,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:19,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481210578] [2021-04-15 02:29:19,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535488186] [2021-04-15 02:29:19,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:19,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:19,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:19,963 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 02:29:19,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:20,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:20,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:20,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:20,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:20,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:20,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:29:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:20,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:20,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:20,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291012607] [2021-04-15 02:29:20,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:20,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:20,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:20,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:20,152 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:20,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:20,352 INFO L93 Difference]: Finished difference Result 95 states and 224 transitions. [2021-04-15 02:29:20,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:20,352 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:20,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:20,353 INFO L225 Difference]: With dead ends: 95 [2021-04-15 02:29:20,353 INFO L226 Difference]: Without dead ends: 81 [2021-04-15 02:29:20,353 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 209.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:20,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-04-15 02:29:20,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2021-04-15 02:29:20,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5416666666666665) internal successors, (183), 72 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:20,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-04-15 02:29:20,355 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 15 [2021-04-15 02:29:20,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:20,356 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-04-15 02:29:20,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:20,356 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-04-15 02:29:20,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:20,356 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:20,356 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:20,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:20,569 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:20,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:20,569 INFO L82 PathProgramCache]: Analyzing trace with hash 515569656, now seen corresponding path program 23 times [2021-04-15 02:29:20,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:20,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819137461] [2021-04-15 02:29:20,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:20,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819137461] [2021-04-15 02:29:20,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729055839] [2021-04-15 02:29:20,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:20,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:29:20,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:20,693 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 02:29:20,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:20,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:20,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:20,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:20,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:20,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:20,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:29:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:20,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:20,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:20,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107001560] [2021-04-15 02:29:20,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:20,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:20,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:20,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:20,895 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:21,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:21,161 INFO L93 Difference]: Finished difference Result 90 states and 217 transitions. [2021-04-15 02:29:21,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:21,161 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:21,162 INFO L225 Difference]: With dead ends: 90 [2021-04-15 02:29:21,162 INFO L226 Difference]: Without dead ends: 81 [2021-04-15 02:29:21,162 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 277.0ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:29:21,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-04-15 02:29:21,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-04-15 02:29:21,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-04-15 02:29:21,163 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 15 [2021-04-15 02:29:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:21,163 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-04-15 02:29:21,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:21,163 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-04-15 02:29:21,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:21,164 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:21,164 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:21,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:21,364 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:21,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:21,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1259153016, now seen corresponding path program 24 times [2021-04-15 02:29:21,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:21,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968574254] [2021-04-15 02:29:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:21,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968574254] [2021-04-15 02:29:21,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759475753] [2021-04-15 02:29:21,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:21,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:29:21,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:21,481 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 02:29:21,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:21,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:21,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:21,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:21,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:21,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:21,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:21,774 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:29:21,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:21,775 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-04-15 02:29:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:21,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:21,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:21,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877963224] [2021-04-15 02:29:21,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:21,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:21,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:21,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:21,809 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:22,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:22,084 INFO L93 Difference]: Finished difference Result 112 states and 256 transitions. [2021-04-15 02:29:22,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:29:22,085 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:22,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:22,085 INFO L225 Difference]: With dead ends: 112 [2021-04-15 02:29:22,085 INFO L226 Difference]: Without dead ends: 102 [2021-04-15 02:29:22,086 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 240.4ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:29:22,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-04-15 02:29:22,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-04-15 02:29:22,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:22,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-04-15 02:29:22,088 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 15 [2021-04-15 02:29:22,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:22,088 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-04-15 02:29:22,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:22,089 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-04-15 02:29:22,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:22,089 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:22,089 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:22,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-04-15 02:29:22,311 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:22,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:22,311 INFO L82 PathProgramCache]: Analyzing trace with hash 49437346, now seen corresponding path program 25 times [2021-04-15 02:29:22,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:22,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172306305] [2021-04-15 02:29:22,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:22,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172306305] [2021-04-15 02:29:22,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740233933] [2021-04-15 02:29:22,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:22,399 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 02:29:22,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:22,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:22,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:22,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:22,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:22,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:22,656 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:22,678 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:29:22,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:22,678 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-04-15 02:29:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:22,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:22,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-04-15 02:29:22,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725960476] [2021-04-15 02:29:22,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:22,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:22,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:22,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:22,709 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:23,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:23,025 INFO L93 Difference]: Finished difference Result 128 states and 283 transitions. [2021-04-15 02:29:23,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:29:23,025 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:23,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:23,025 INFO L225 Difference]: With dead ends: 128 [2021-04-15 02:29:23,026 INFO L226 Difference]: Without dead ends: 118 [2021-04-15 02:29:23,026 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:29:23,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-04-15 02:29:23,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 77. [2021-04-15 02:29:23,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.539473684210526) internal successors, (193), 76 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:23,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2021-04-15 02:29:23,028 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 15 [2021-04-15 02:29:23,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:23,028 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2021-04-15 02:29:23,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:23,028 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2021-04-15 02:29:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:23,029 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:23,029 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:23,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:23,237 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:23,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:23,237 INFO L82 PathProgramCache]: Analyzing trace with hash -611826437, now seen corresponding path program 26 times [2021-04-15 02:29:23,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:23,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353860930] [2021-04-15 02:29:23,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:23,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:23,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353860930] [2021-04-15 02:29:23,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279876508] [2021-04-15 02:29:23,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:23,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:23,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:23,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:29:23,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:23,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:23,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:29:23,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691404553] [2021-04-15 02:29:23,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:29:23,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:23,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:29:23,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:29:23,314 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:23,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:23,361 INFO L93 Difference]: Finished difference Result 163 states and 339 transitions. [2021-04-15 02:29:23,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:29:23,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:23,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:23,362 INFO L225 Difference]: With dead ends: 163 [2021-04-15 02:29:23,362 INFO L226 Difference]: Without dead ends: 163 [2021-04-15 02:29:23,362 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:23,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-04-15 02:29:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 82. [2021-04-15 02:29:23,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.617283950617284) internal successors, (212), 81 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:23,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 212 transitions. [2021-04-15 02:29:23,365 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 212 transitions. Word has length 15 [2021-04-15 02:29:23,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:23,365 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 212 transitions. [2021-04-15 02:29:23,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:23,365 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 212 transitions. [2021-04-15 02:29:23,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:23,366 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:23,366 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:23,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:23,587 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:23,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:23,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1007434568, now seen corresponding path program 27 times [2021-04-15 02:29:23,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:23,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938450929] [2021-04-15 02:29:23,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:23,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938450929] [2021-04-15 02:29:23,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295539305] [2021-04-15 02:29:23,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:23,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:29:23,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:23,699 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 02:29:23,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:23,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:23,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:23,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:23,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:23,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:23,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:29:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:23,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:23,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:23,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024659569] [2021-04-15 02:29:23,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:23,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:23,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:23,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:23,892 INFO L87 Difference]: Start difference. First operand 82 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:24,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:24,135 INFO L93 Difference]: Finished difference Result 95 states and 233 transitions. [2021-04-15 02:29:24,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:29:24,135 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:24,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:24,136 INFO L225 Difference]: With dead ends: 95 [2021-04-15 02:29:24,136 INFO L226 Difference]: Without dead ends: 86 [2021-04-15 02:29:24,136 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 314.7ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:29:24,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-04-15 02:29:24,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2021-04-15 02:29:24,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:24,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-04-15 02:29:24,138 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-04-15 02:29:24,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:24,138 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-04-15 02:29:24,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:24,139 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-04-15 02:29:24,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:24,139 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:24,139 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:24,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:24,357 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:24,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:24,357 INFO L82 PathProgramCache]: Analyzing trace with hash -263851208, now seen corresponding path program 28 times [2021-04-15 02:29:24,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:24,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446111274] [2021-04-15 02:29:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:24,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446111274] [2021-04-15 02:29:24,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492017076] [2021-04-15 02:29:24,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:24,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:24,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:24,471 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 02:29:24,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:24,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:24,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:24,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:24,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:24,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:24,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-04-15 02:29:24,749 INFO L628 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2021-04-15 02:29:24,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:24,750 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-04-15 02:29:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:24,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:24,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:24,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961191797] [2021-04-15 02:29:24,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:24,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:24,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:24,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:24,780 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:25,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:25,091 INFO L93 Difference]: Finished difference Result 118 states and 273 transitions. [2021-04-15 02:29:25,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:25,092 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:25,092 INFO L225 Difference]: With dead ends: 118 [2021-04-15 02:29:25,092 INFO L226 Difference]: Without dead ends: 108 [2021-04-15 02:29:25,093 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 284.4ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:29:25,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-04-15 02:29:25,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2021-04-15 02:29:25,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-04-15 02:29:25,095 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-04-15 02:29:25,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:25,095 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-04-15 02:29:25,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:25,096 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-04-15 02:29:25,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:25,096 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:25,096 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:25,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:25,317 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:25,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:25,317 INFO L82 PathProgramCache]: Analyzing trace with hash 587292924, now seen corresponding path program 29 times [2021-04-15 02:29:25,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:25,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679410185] [2021-04-15 02:29:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:25,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679410185] [2021-04-15 02:29:25,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677062331] [2021-04-15 02:29:25,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:25,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:29:25,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:25,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 02:29:25,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:25,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:25,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:25,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:25,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:25,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:25,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-04-15 02:29:25,696 INFO L628 ElimStorePlain]: treesize reduction 26, result has 40.9 percent of original size [2021-04-15 02:29:25,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:25,697 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-04-15 02:29:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:25,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:25,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:25,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807118112] [2021-04-15 02:29:25,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:25,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:25,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:25,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:25,729 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:26,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:26,027 INFO L93 Difference]: Finished difference Result 140 states and 313 transitions. [2021-04-15 02:29:26,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:29:26,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:26,028 INFO L225 Difference]: With dead ends: 140 [2021-04-15 02:29:26,028 INFO L226 Difference]: Without dead ends: 130 [2021-04-15 02:29:26,028 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 267.6ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:29:26,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-04-15 02:29:26,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 82. [2021-04-15 02:29:26,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-04-15 02:29:26,031 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-04-15 02:29:26,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:26,031 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-04-15 02:29:26,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:26,031 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-04-15 02:29:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:26,032 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:26,032 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:26,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable396 [2021-04-15 02:29:26,253 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:26,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:26,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1202957240, now seen corresponding path program 30 times [2021-04-15 02:29:26,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:26,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192082520] [2021-04-15 02:29:26,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:26,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:26,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192082520] [2021-04-15 02:29:26,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347562126] [2021-04-15 02:29:26,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:26,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:29:26,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:26,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 02:29:26,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:26,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:26,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:26,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:26,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:26,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:26,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:26,667 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:29:26,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:26,667 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-04-15 02:29:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:26,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:26,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:26,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869219183] [2021-04-15 02:29:26,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:26,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:26,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:26,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:26,702 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:27,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:27,137 INFO L93 Difference]: Finished difference Result 157 states and 342 transitions. [2021-04-15 02:29:27,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:29:27,137 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:27,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:27,138 INFO L225 Difference]: With dead ends: 157 [2021-04-15 02:29:27,138 INFO L226 Difference]: Without dead ends: 147 [2021-04-15 02:29:27,138 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 409.3ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:27,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-04-15 02:29:27,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 84. [2021-04-15 02:29:27,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.5903614457831323) internal successors, (215), 83 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:27,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 215 transitions. [2021-04-15 02:29:27,141 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 215 transitions. Word has length 15 [2021-04-15 02:29:27,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:27,141 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 215 transitions. [2021-04-15 02:29:27,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:27,141 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 215 transitions. [2021-04-15 02:29:27,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:27,141 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:27,141 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:27,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-04-15 02:29:27,342 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:27,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:27,342 INFO L82 PathProgramCache]: Analyzing trace with hash -2134830661, now seen corresponding path program 31 times [2021-04-15 02:29:27,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:27,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036453404] [2021-04-15 02:29:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:27,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036453404] [2021-04-15 02:29:27,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667184934] [2021-04-15 02:29:27,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:27,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:29:27,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:27,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:27,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-04-15 02:29:27,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053314096] [2021-04-15 02:29:27,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:27,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:27,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:27,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:27,433 INFO L87 Difference]: Start difference. First operand 84 states and 215 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:27,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:27,512 INFO L93 Difference]: Finished difference Result 200 states and 410 transitions. [2021-04-15 02:29:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:29:27,513 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:27,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:27,514 INFO L225 Difference]: With dead ends: 200 [2021-04-15 02:29:27,514 INFO L226 Difference]: Without dead ends: 200 [2021-04-15 02:29:27,515 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:27,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-04-15 02:29:27,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 93. [2021-04-15 02:29:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6739130434782608) internal successors, (246), 92 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 246 transitions. [2021-04-15 02:29:27,518 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 246 transitions. Word has length 15 [2021-04-15 02:29:27,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:27,520 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 246 transitions. [2021-04-15 02:29:27,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:27,520 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 246 transitions. [2021-04-15 02:29:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:27,520 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:27,521 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:27,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-04-15 02:29:27,742 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:27,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:27,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1513780834, now seen corresponding path program 32 times [2021-04-15 02:29:27,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:27,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697656369] [2021-04-15 02:29:27,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:27,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697656369] [2021-04-15 02:29:27,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965529358] [2021-04-15 02:29:27,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:27,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:27,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:27,861 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 02:29:27,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:28,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:28,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:28,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:28,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:28,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:28,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:29:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:28,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:28,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:28,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880231217] [2021-04-15 02:29:28,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:28,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:28,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:28,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:28,029 INFO L87 Difference]: Start difference. First operand 93 states and 246 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:28,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:28,248 INFO L93 Difference]: Finished difference Result 107 states and 271 transitions. [2021-04-15 02:29:28,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:29:28,249 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:28,249 INFO L225 Difference]: With dead ends: 107 [2021-04-15 02:29:28,249 INFO L226 Difference]: Without dead ends: 98 [2021-04-15 02:29:28,249 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:29:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-04-15 02:29:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-04-15 02:29:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-04-15 02:29:28,252 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-04-15 02:29:28,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:28,252 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-04-15 02:29:28,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-04-15 02:29:28,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:28,252 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:28,252 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:28,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:28,469 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:28,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:28,469 INFO L82 PathProgramCache]: Analyzing trace with hash -770197474, now seen corresponding path program 33 times [2021-04-15 02:29:28,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:28,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865049709] [2021-04-15 02:29:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:28,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865049709] [2021-04-15 02:29:28,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191170090] [2021-04-15 02:29:28,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:29:28,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:29:28,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:28,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 02:29:28,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:28,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:28,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:28,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:28,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:28,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:28,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:28,909 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:29:28,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:28,910 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-04-15 02:29:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:28,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:28,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:28,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458978798] [2021-04-15 02:29:28,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:28,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:28,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:28,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:28,942 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:29,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:29,235 INFO L93 Difference]: Finished difference Result 135 states and 326 transitions. [2021-04-15 02:29:29,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:29:29,235 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:29,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:29,236 INFO L225 Difference]: With dead ends: 135 [2021-04-15 02:29:29,236 INFO L226 Difference]: Without dead ends: 125 [2021-04-15 02:29:29,236 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 343.9ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:29,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-04-15 02:29:29,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2021-04-15 02:29:29,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:29,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-04-15 02:29:29,239 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-04-15 02:29:29,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:29,239 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-04-15 02:29:29,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:29,239 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-04-15 02:29:29,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:29,239 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:29,239 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:29,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-04-15 02:29:29,449 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:29,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:29,449 INFO L82 PathProgramCache]: Analyzing trace with hash 80946658, now seen corresponding path program 34 times [2021-04-15 02:29:29,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:29,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191645080] [2021-04-15 02:29:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:29,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191645080] [2021-04-15 02:29:29,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297288692] [2021-04-15 02:29:29,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:29,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:29,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:29,544 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 02:29:29,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:29,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:29,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:29,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:29,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:29,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:29,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:29,819 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:29:29,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:29,820 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-04-15 02:29:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:29,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:29,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:29,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826966180] [2021-04-15 02:29:29,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:29,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:29,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:29,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:29,851 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:30,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:30,244 INFO L93 Difference]: Finished difference Result 158 states and 363 transitions. [2021-04-15 02:29:30,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:29:30,244 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:30,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:30,245 INFO L225 Difference]: With dead ends: 158 [2021-04-15 02:29:30,245 INFO L226 Difference]: Without dead ends: 148 [2021-04-15 02:29:30,245 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 333.8ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:29:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-04-15 02:29:30,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 93. [2021-04-15 02:29:30,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:30,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-04-15 02:29:30,248 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-04-15 02:29:30,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:30,248 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-04-15 02:29:30,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:30,248 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-04-15 02:29:30,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:30,248 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:30,248 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:30,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable540,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:30,469 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:30,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:30,470 INFO L82 PathProgramCache]: Analyzing trace with hash 696610974, now seen corresponding path program 35 times [2021-04-15 02:29:30,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:30,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547428570] [2021-04-15 02:29:30,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:30,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547428570] [2021-04-15 02:29:30,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095037824] [2021-04-15 02:29:30,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:29:30,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:29:30,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:30,572 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 02:29:30,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:30,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:30,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:30,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:30,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:30,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:30,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-04-15 02:29:30,863 INFO L628 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2021-04-15 02:29:30,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:30,864 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-04-15 02:29:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:30,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:30,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:30,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27791024] [2021-04-15 02:29:30,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:30,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:30,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:30,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:30,892 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:31,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:31,380 INFO L93 Difference]: Finished difference Result 169 states and 379 transitions. [2021-04-15 02:29:31,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:29:31,380 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:31,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:31,381 INFO L225 Difference]: With dead ends: 169 [2021-04-15 02:29:31,381 INFO L226 Difference]: Without dead ends: 159 [2021-04-15 02:29:31,381 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 458.6ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:29:31,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-04-15 02:29:31,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 93. [2021-04-15 02:29:31,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:31,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-04-15 02:29:31,384 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-04-15 02:29:31,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:31,384 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-04-15 02:29:31,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:31,384 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-04-15 02:29:31,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:31,384 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:31,384 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:31,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:31,597 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:31,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:31,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1692631710, now seen corresponding path program 36 times [2021-04-15 02:29:31,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:31,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612594351] [2021-04-15 02:29:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:31,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612594351] [2021-04-15 02:29:31,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804093203] [2021-04-15 02:29:31,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:29:31,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:29:31,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:31,704 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 02:29:31,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:31,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:31,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:31,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:31,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:31,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:32,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:32,022 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:29:32,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:32,023 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-04-15 02:29:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:32,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:32,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:32,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804245199] [2021-04-15 02:29:32,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:32,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:32,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:32,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:32,049 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:32,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:32,468 INFO L93 Difference]: Finished difference Result 140 states and 323 transitions. [2021-04-15 02:29:32,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:29:32,468 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:32,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:32,468 INFO L225 Difference]: With dead ends: 140 [2021-04-15 02:29:32,469 INFO L226 Difference]: Without dead ends: 130 [2021-04-15 02:29:32,469 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 486.4ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:29:32,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-04-15 02:29:32,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 95. [2021-04-15 02:29:32,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.6382978723404253) internal successors, (248), 94 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:32,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 248 transitions. [2021-04-15 02:29:32,472 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 248 transitions. Word has length 15 [2021-04-15 02:29:32,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:32,472 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 248 transitions. [2021-04-15 02:29:32,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:32,472 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 248 transitions. [2021-04-15 02:29:32,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:32,473 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:32,473 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:32,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-04-15 02:29:32,694 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:32,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:32,694 INFO L82 PathProgramCache]: Analyzing trace with hash -2103321349, now seen corresponding path program 37 times [2021-04-15 02:29:32,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:32,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013706797] [2021-04-15 02:29:32,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:32,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013706797] [2021-04-15 02:29:32,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886823241] [2021-04-15 02:29:32,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:32,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:29:32,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:32,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:32,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-04-15 02:29:32,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519989662] [2021-04-15 02:29:32,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:32,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:32,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:32,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:32,770 INFO L87 Difference]: Start difference. First operand 95 states and 248 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:32,850 INFO L93 Difference]: Finished difference Result 170 states and 379 transitions. [2021-04-15 02:29:32,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:29:32,850 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:32,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:32,851 INFO L225 Difference]: With dead ends: 170 [2021-04-15 02:29:32,851 INFO L226 Difference]: Without dead ends: 170 [2021-04-15 02:29:32,851 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:32,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-04-15 02:29:32,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 102. [2021-04-15 02:29:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.6831683168316833) internal successors, (271), 101 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 271 transitions. [2021-04-15 02:29:32,854 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 271 transitions. Word has length 15 [2021-04-15 02:29:32,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:32,854 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 271 transitions. [2021-04-15 02:29:32,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:32,854 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 271 transitions. [2021-04-15 02:29:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:32,854 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:32,854 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:33,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-04-15 02:29:33,069 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:33,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:33,069 INFO L82 PathProgramCache]: Analyzing trace with hash -30645896, now seen corresponding path program 38 times [2021-04-15 02:29:33,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:33,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454601175] [2021-04-15 02:29:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:33,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454601175] [2021-04-15 02:29:33,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063261324] [2021-04-15 02:29:33,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:33,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:33,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:33,179 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 02:29:33,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:33,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:33,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:33,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:33,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:33,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:33,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:29:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:33,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:33,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:33,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298785119] [2021-04-15 02:29:33,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:33,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:33,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:33,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:33,390 INFO L87 Difference]: Start difference. First operand 102 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:33,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:33,572 INFO L93 Difference]: Finished difference Result 120 states and 308 transitions. [2021-04-15 02:29:33,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:33,573 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:33,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:33,573 INFO L225 Difference]: With dead ends: 120 [2021-04-15 02:29:33,573 INFO L226 Difference]: Without dead ends: 111 [2021-04-15 02:29:33,573 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 239.2ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:33,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-04-15 02:29:33,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2021-04-15 02:29:33,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.6862745098039214) internal successors, (274), 102 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:33,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 274 transitions. [2021-04-15 02:29:33,575 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 274 transitions. Word has length 15 [2021-04-15 02:29:33,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:33,575 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 274 transitions. [2021-04-15 02:29:33,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:33,576 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 274 transitions. [2021-04-15 02:29:33,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:33,593 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:33,593 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:33,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable656 [2021-04-15 02:29:33,814 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:33,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:33,814 INFO L82 PathProgramCache]: Analyzing trace with hash 712937464, now seen corresponding path program 39 times [2021-04-15 02:29:33,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:33,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949974693] [2021-04-15 02:29:33,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:33,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949974693] [2021-04-15 02:29:33,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670713676] [2021-04-15 02:29:33,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:29:33,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:29:33,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:33,941 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 02:29:33,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:34,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:34,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:34,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:34,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:34,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:34,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:34,197 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:29:34,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:34,198 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-04-15 02:29:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:34,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:34,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:34,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960400856] [2021-04-15 02:29:34,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:34,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:34,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:34,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:34,230 INFO L87 Difference]: Start difference. First operand 103 states and 274 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:34,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:34,511 INFO L93 Difference]: Finished difference Result 154 states and 382 transitions. [2021-04-15 02:29:34,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:29:34,511 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:34,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:34,512 INFO L225 Difference]: With dead ends: 154 [2021-04-15 02:29:34,512 INFO L226 Difference]: Without dead ends: 144 [2021-04-15 02:29:34,512 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 283.7ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:29:34,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-04-15 02:29:34,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 102. [2021-04-15 02:29:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.6831683168316833) internal successors, (271), 101 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:34,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 271 transitions. [2021-04-15 02:29:34,514 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 271 transitions. Word has length 15 [2021-04-15 02:29:34,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:34,515 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 271 transitions. [2021-04-15 02:29:34,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:34,515 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 271 transitions. [2021-04-15 02:29:34,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:34,515 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:34,515 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:34,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable668,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:34,729 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:34,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:34,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1564081596, now seen corresponding path program 40 times [2021-04-15 02:29:34,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:34,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188016738] [2021-04-15 02:29:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:34,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188016738] [2021-04-15 02:29:34,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230583997] [2021-04-15 02:29:34,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:34,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:34,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:34,815 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 02:29:34,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:34,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:34,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:34,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:35,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:35,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:35,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-04-15 02:29:35,074 INFO L628 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2021-04-15 02:29:35,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:35,075 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-04-15 02:29:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:35,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:35,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:35,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254241407] [2021-04-15 02:29:35,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:35,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:35,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:35,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:35,106 INFO L87 Difference]: Start difference. First operand 102 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:35,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:35,588 INFO L93 Difference]: Finished difference Result 176 states and 417 transitions. [2021-04-15 02:29:35,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:29:35,588 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:35,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:35,589 INFO L225 Difference]: With dead ends: 176 [2021-04-15 02:29:35,589 INFO L226 Difference]: Without dead ends: 166 [2021-04-15 02:29:35,589 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 407.0ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:29:35,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-04-15 02:29:35,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 103. [2021-04-15 02:29:35,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.6862745098039214) internal successors, (274), 102 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:35,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 274 transitions. [2021-04-15 02:29:35,591 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 274 transitions. Word has length 15 [2021-04-15 02:29:35,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:35,591 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 274 transitions. [2021-04-15 02:29:35,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:35,591 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 274 transitions. [2021-04-15 02:29:35,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:35,591 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:35,592 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:35,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable703,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:35,805 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:35,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:35,805 INFO L82 PathProgramCache]: Analyzing trace with hash 902817813, now seen corresponding path program 41 times [2021-04-15 02:29:35,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:35,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753668297] [2021-04-15 02:29:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:35,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753668297] [2021-04-15 02:29:35,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612037973] [2021-04-15 02:29:35,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:35,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:29:35,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:35,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:29:35,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:35,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:35,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:29:35,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277342293] [2021-04-15 02:29:35,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:29:35,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:35,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:29:35,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:29:35,893 INFO L87 Difference]: Start difference. First operand 103 states and 274 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:35,928 INFO L93 Difference]: Finished difference Result 196 states and 448 transitions. [2021-04-15 02:29:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:29:35,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:35,929 INFO L225 Difference]: With dead ends: 196 [2021-04-15 02:29:35,929 INFO L226 Difference]: Without dead ends: 196 [2021-04-15 02:29:35,929 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:35,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-04-15 02:29:35,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 121. [2021-04-15 02:29:35,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.7666666666666666) internal successors, (332), 120 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:35,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 332 transitions. [2021-04-15 02:29:35,933 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 332 transitions. Word has length 15 [2021-04-15 02:29:35,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:35,933 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 332 transitions. [2021-04-15 02:29:35,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:35,933 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 332 transitions. [2021-04-15 02:29:35,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:35,933 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:35,933 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:36,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable743 [2021-04-15 02:29:36,149 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:36,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:36,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2115221384, now seen corresponding path program 42 times [2021-04-15 02:29:36,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:36,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483841137] [2021-04-15 02:29:36,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:36,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483841137] [2021-04-15 02:29:36,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412748371] [2021-04-15 02:29:36,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:36,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:29:36,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:36,251 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 02:29:36,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:36,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:36,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:36,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:36,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:36,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:36,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:36,538 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:29:36,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:36,539 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-04-15 02:29:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:36,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:36,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:36,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247727104] [2021-04-15 02:29:36,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:36,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:36,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:36,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:36,570 INFO L87 Difference]: Start difference. First operand 121 states and 332 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:37,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:37,100 INFO L93 Difference]: Finished difference Result 209 states and 492 transitions. [2021-04-15 02:29:37,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:29:37,101 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:37,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:37,101 INFO L225 Difference]: With dead ends: 209 [2021-04-15 02:29:37,101 INFO L226 Difference]: Without dead ends: 199 [2021-04-15 02:29:37,101 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 501.9ms TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:29:37,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-04-15 02:29:37,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 120. [2021-04-15 02:29:37,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.764705882352941) internal successors, (329), 119 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:37,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 329 transitions. [2021-04-15 02:29:37,104 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 329 transitions. Word has length 15 [2021-04-15 02:29:37,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:37,104 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 329 transitions. [2021-04-15 02:29:37,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:37,104 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 329 transitions. [2021-04-15 02:29:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:37,105 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:37,105 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:37,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable744 [2021-04-15 02:29:37,317 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:37,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:37,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1158041989, now seen corresponding path program 43 times [2021-04-15 02:29:37,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:37,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422170589] [2021-04-15 02:29:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:37,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422170589] [2021-04-15 02:29:37,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224222374] [2021-04-15 02:29:37,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:29:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:37,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:29:37,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:37,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:37,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-04-15 02:29:37,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600911553] [2021-04-15 02:29:37,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:37,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:37,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:37,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:37,423 INFO L87 Difference]: Start difference. First operand 120 states and 329 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:37,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:37,494 INFO L93 Difference]: Finished difference Result 219 states and 478 transitions. [2021-04-15 02:29:37,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:29:37,494 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:37,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:37,495 INFO L225 Difference]: With dead ends: 219 [2021-04-15 02:29:37,495 INFO L226 Difference]: Without dead ends: 219 [2021-04-15 02:29:37,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:37,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-04-15 02:29:37,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 114. [2021-04-15 02:29:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:37,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-04-15 02:29:37,498 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-04-15 02:29:37,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:37,498 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-04-15 02:29:37,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:37,499 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-04-15 02:29:37,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:37,499 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:37,499 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:37,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-04-15 02:29:37,713 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:37,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:37,713 INFO L82 PathProgramCache]: Analyzing trace with hash -209496772, now seen corresponding path program 44 times [2021-04-15 02:29:37,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:37,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184001116] [2021-04-15 02:29:37,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:37,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184001116] [2021-04-15 02:29:37,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325520304] [2021-04-15 02:29:37,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:37,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:37,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:37,795 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 02:29:37,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:37,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:37,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:37,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:37,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:37,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:38,050 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:38,071 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:29:38,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:38,072 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-04-15 02:29:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:38,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:38,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:38,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621564412] [2021-04-15 02:29:38,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:38,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:38,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:38,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:38,102 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:38,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:38,509 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2021-04-15 02:29:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:29:38,509 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:38,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:38,510 INFO L225 Difference]: With dead ends: 172 [2021-04-15 02:29:38,510 INFO L226 Difference]: Without dead ends: 162 [2021-04-15 02:29:38,510 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 466.2ms TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:29:38,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-04-15 02:29:38,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2021-04-15 02:29:38,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:38,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-04-15 02:29:38,512 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-04-15 02:29:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:38,512 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-04-15 02:29:38,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:38,512 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-04-15 02:29:38,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:38,512 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:38,512 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:38,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-04-15 02:29:38,729 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:38,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:38,729 INFO L82 PathProgramCache]: Analyzing trace with hash -620186411, now seen corresponding path program 45 times [2021-04-15 02:29:38,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:38,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283431117] [2021-04-15 02:29:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:38,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283431117] [2021-04-15 02:29:38,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388179028] [2021-04-15 02:29:38,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:38,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:29:38,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:38,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:29:38,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:38,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:38,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-04-15 02:29:38,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520048069] [2021-04-15 02:29:38,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:38,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:38,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:38,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:38,824 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:38,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:38,907 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2021-04-15 02:29:38,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:29:38,907 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:38,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:38,908 INFO L225 Difference]: With dead ends: 175 [2021-04-15 02:29:38,908 INFO L226 Difference]: Without dead ends: 175 [2021-04-15 02:29:38,908 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:38,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-04-15 02:29:38,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2021-04-15 02:29:38,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:38,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-04-15 02:29:38,911 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-04-15 02:29:38,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:38,911 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-04-15 02:29:38,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-04-15 02:29:38,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:38,911 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:38,911 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:39,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable832 [2021-04-15 02:29:39,121 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:39,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:39,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1261575944, now seen corresponding path program 46 times [2021-04-15 02:29:39,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:39,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556552314] [2021-04-15 02:29:39,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:39,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556552314] [2021-04-15 02:29:39,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590061866] [2021-04-15 02:29:39,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:39,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:39,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:39,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 02:29:39,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:39,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:39,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-04-15 02:29:39,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:39,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:39,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-04-15 02:29:39,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-04-15 02:29:39,516 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:29:39,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:29:39,517 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-04-15 02:29:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:39,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:39,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:39,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481717224] [2021-04-15 02:29:39,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:39,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:39,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:39,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:39,543 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:39,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:39,957 INFO L93 Difference]: Finished difference Result 162 states and 391 transitions. [2021-04-15 02:29:39,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:29:39,957 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:39,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:39,958 INFO L225 Difference]: With dead ends: 162 [2021-04-15 02:29:39,958 INFO L226 Difference]: Without dead ends: 152 [2021-04-15 02:29:39,958 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 524.1ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:29:39,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-04-15 02:29:39,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 116. [2021-04-15 02:29:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.7217391304347824) internal successors, (313), 115 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:39,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 313 transitions. [2021-04-15 02:29:39,961 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 313 transitions. Word has length 15 [2021-04-15 02:29:39,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:39,961 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 313 transitions. [2021-04-15 02:29:39,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:39,961 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 313 transitions. [2021-04-15 02:29:39,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:29:39,961 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:39,962 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:40,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable833 [2021-04-15 02:29:40,169 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:40,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:40,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1126532677, now seen corresponding path program 47 times [2021-04-15 02:29:40,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:40,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977252388] [2021-04-15 02:29:40,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:40,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977252388] [2021-04-15 02:29:40,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610486841] [2021-04-15 02:29:40,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:29:40,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:29:40,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:40,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:29:40,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:40,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:40,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-04-15 02:29:40,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191182369] [2021-04-15 02:29:40,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:40,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:40,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:40,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:40,263 INFO L87 Difference]: Start difference. First operand 116 states and 313 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:40,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:40,350 INFO L93 Difference]: Finished difference Result 188 states and 448 transitions. [2021-04-15 02:29:40,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:29:40,350 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:29:40,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:40,350 INFO L225 Difference]: With dead ends: 188 [2021-04-15 02:29:40,351 INFO L226 Difference]: Without dead ends: 188 [2021-04-15 02:29:40,351 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-04-15 02:29:40,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 122. [2021-04-15 02:29:40,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.7355371900826446) internal successors, (331), 121 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:40,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 331 transitions. [2021-04-15 02:29:40,353 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 331 transitions. Word has length 15 [2021-04-15 02:29:40,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:40,354 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 331 transitions. [2021-04-15 02:29:40,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:40,354 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 331 transitions. [2021-04-15 02:29:40,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:40,354 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:40,354 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:40,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable870,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:40,573 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:40,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:40,573 INFO L82 PathProgramCache]: Analyzing trace with hash -43188332, now seen corresponding path program 48 times [2021-04-15 02:29:40,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:40,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980696140] [2021-04-15 02:29:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:40,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980696140] [2021-04-15 02:29:40,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308332678] [2021-04-15 02:29:40,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:40,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:29:40,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:40,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 02:29:40,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:40,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:40,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:40,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:40,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:40,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:40,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:40,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:40,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:40,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296223431] [2021-04-15 02:29:40,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:40,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:40,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:40,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:40,871 INFO L87 Difference]: Start difference. First operand 122 states and 331 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:41,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:41,109 INFO L93 Difference]: Finished difference Result 161 states and 428 transitions. [2021-04-15 02:29:41,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:41,109 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:41,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:41,110 INFO L225 Difference]: With dead ends: 161 [2021-04-15 02:29:41,110 INFO L226 Difference]: Without dead ends: 156 [2021-04-15 02:29:41,110 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:29:41,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-04-15 02:29:41,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 134. [2021-04-15 02:29:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.7593984962406015) internal successors, (367), 133 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:41,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 367 transitions. [2021-04-15 02:29:41,113 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 367 transitions. Word has length 16 [2021-04-15 02:29:41,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:41,113 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 367 transitions. [2021-04-15 02:29:41,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:41,113 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 367 transitions. [2021-04-15 02:29:41,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:41,114 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:41,114 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:41,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-04-15 02:29:41,321 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:41,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:41,321 INFO L82 PathProgramCache]: Analyzing trace with hash 343012782, now seen corresponding path program 49 times [2021-04-15 02:29:41,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:41,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707545524] [2021-04-15 02:29:41,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:41,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707545524] [2021-04-15 02:29:41,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102162344] [2021-04-15 02:29:41,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:29:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:41,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 02:29:41,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:41,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:41,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:41,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:41,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:41,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:41,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:41,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:41,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:41,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972151612] [2021-04-15 02:29:41,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:41,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:41,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:41,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:41,656 INFO L87 Difference]: Start difference. First operand 134 states and 367 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:41,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:41,920 INFO L93 Difference]: Finished difference Result 174 states and 444 transitions. [2021-04-15 02:29:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:29:41,920 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:41,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:41,921 INFO L225 Difference]: With dead ends: 174 [2021-04-15 02:29:41,921 INFO L226 Difference]: Without dead ends: 169 [2021-04-15 02:29:41,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:29:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-04-15 02:29:41,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2021-04-15 02:29:41,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.7593984962406015) internal successors, (367), 133 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:41,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 367 transitions. [2021-04-15 02:29:41,925 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 367 transitions. Word has length 16 [2021-04-15 02:29:41,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:41,925 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 367 transitions. [2021-04-15 02:29:41,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:41,925 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 367 transitions. [2021-04-15 02:29:41,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:41,926 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:41,926 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:42,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable898,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:42,145 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:42,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:42,145 INFO L82 PathProgramCache]: Analyzing trace with hash -318251001, now seen corresponding path program 50 times [2021-04-15 02:29:42,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:42,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645483753] [2021-04-15 02:29:42,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:42,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645483753] [2021-04-15 02:29:42,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613104237] [2021-04-15 02:29:42,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:42,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:42,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:42,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:29:42,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:42,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:42,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-04-15 02:29:42,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738613965] [2021-04-15 02:29:42,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:42,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:42,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:42,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:42,237 INFO L87 Difference]: Start difference. First operand 134 states and 367 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:42,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:42,284 INFO L93 Difference]: Finished difference Result 261 states and 586 transitions. [2021-04-15 02:29:42,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:29:42,284 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:42,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:42,286 INFO L225 Difference]: With dead ends: 261 [2021-04-15 02:29:42,286 INFO L226 Difference]: Without dead ends: 261 [2021-04-15 02:29:42,286 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:42,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-04-15 02:29:42,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 136. [2021-04-15 02:29:42,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:42,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-04-15 02:29:42,288 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-04-15 02:29:42,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:42,288 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-04-15 02:29:42,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:42,289 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-04-15 02:29:42,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:42,289 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:42,289 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:42,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable922 [2021-04-15 02:29:42,490 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:42,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:42,490 INFO L82 PathProgramCache]: Analyzing trace with hash -713859132, now seen corresponding path program 51 times [2021-04-15 02:29:42,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:42,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717919457] [2021-04-15 02:29:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:42,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717919457] [2021-04-15 02:29:42,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674168875] [2021-04-15 02:29:42,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:42,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:29:42,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:42,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 02:29:42,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:42,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:42,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:42,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:42,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:42,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:42,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:42,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:42,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:42,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785243819] [2021-04-15 02:29:42,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:42,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:42,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:42,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:42,778 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:43,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:43,000 INFO L93 Difference]: Finished difference Result 173 states and 438 transitions. [2021-04-15 02:29:43,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:29:43,001 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:43,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:43,001 INFO L225 Difference]: With dead ends: 173 [2021-04-15 02:29:43,001 INFO L226 Difference]: Without dead ends: 168 [2021-04-15 02:29:43,002 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:29:43,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-04-15 02:29:43,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 136. [2021-04-15 02:29:43,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:43,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-04-15 02:29:43,005 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-04-15 02:29:43,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:43,005 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-04-15 02:29:43,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:43,006 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-04-15 02:29:43,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:43,006 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:43,006 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:43,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable923,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:43,206 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:43,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:43,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1841255225, now seen corresponding path program 52 times [2021-04-15 02:29:43,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:43,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783891502] [2021-04-15 02:29:43,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:43,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783891502] [2021-04-15 02:29:43,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223718643] [2021-04-15 02:29:43,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:43,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:43,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:43,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:29:43,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:43,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:43,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:29:43,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285515704] [2021-04-15 02:29:43,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:43,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:43,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:43,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:43,298 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:43,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:43,361 INFO L93 Difference]: Finished difference Result 272 states and 604 transitions. [2021-04-15 02:29:43,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:29:43,362 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:43,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:43,363 INFO L225 Difference]: With dead ends: 272 [2021-04-15 02:29:43,363 INFO L226 Difference]: Without dead ends: 272 [2021-04-15 02:29:43,363 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:43,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-04-15 02:29:43,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 136. [2021-04-15 02:29:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-04-15 02:29:43,368 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-04-15 02:29:43,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:43,368 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-04-15 02:29:43,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:43,369 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-04-15 02:29:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:43,369 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:43,369 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:43,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable947 [2021-04-15 02:29:43,591 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:43,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:43,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1220205398, now seen corresponding path program 53 times [2021-04-15 02:29:43,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:43,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619901733] [2021-04-15 02:29:43,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:43,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:43,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619901733] [2021-04-15 02:29:43,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362369811] [2021-04-15 02:29:43,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:43,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:29:43,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:43,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 02:29:43,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:43,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:43,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:43,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:43,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:43,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:43,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:43,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:43,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:43,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751609294] [2021-04-15 02:29:43,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:43,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:43,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:43,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:43,883 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:44,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:44,072 INFO L93 Difference]: Finished difference Result 152 states and 404 transitions. [2021-04-15 02:29:44,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:29:44,072 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:44,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:44,073 INFO L225 Difference]: With dead ends: 152 [2021-04-15 02:29:44,073 INFO L226 Difference]: Without dead ends: 147 [2021-04-15 02:29:44,073 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:29:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-04-15 02:29:44,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 134. [2021-04-15 02:29:44,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.774436090225564) internal successors, (369), 133 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:44,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 369 transitions. [2021-04-15 02:29:44,078 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 369 transitions. Word has length 16 [2021-04-15 02:29:44,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:44,079 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 369 transitions. [2021-04-15 02:29:44,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:44,079 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 369 transitions. [2021-04-15 02:29:44,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:44,079 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:44,079 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:44,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable948,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:44,293 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:44,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1947365805, now seen corresponding path program 54 times [2021-04-15 02:29:44,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:44,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204699481] [2021-04-15 02:29:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:44,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204699481] [2021-04-15 02:29:44,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564758254] [2021-04-15 02:29:44,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:44,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:29:44,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:44,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:29:44,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:44,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:44,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:29:44,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063449280] [2021-04-15 02:29:44,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:44,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:44,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:44,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:44,396 INFO L87 Difference]: Start difference. First operand 134 states and 369 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:44,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:44,458 INFO L93 Difference]: Finished difference Result 271 states and 600 transitions. [2021-04-15 02:29:44,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:29:44,459 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:44,460 INFO L225 Difference]: With dead ends: 271 [2021-04-15 02:29:44,460 INFO L226 Difference]: Without dead ends: 271 [2021-04-15 02:29:44,460 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-04-15 02:29:44,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 137. [2021-04-15 02:29:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.8088235294117645) internal successors, (382), 136 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 382 transitions. [2021-04-15 02:29:44,463 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 382 transitions. Word has length 16 [2021-04-15 02:29:44,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:44,463 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 382 transitions. [2021-04-15 02:29:44,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:44,463 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 382 transitions. [2021-04-15 02:29:44,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:44,464 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:44,464 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:44,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable969 [2021-04-15 02:29:44,685 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:44,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:44,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1809745913, now seen corresponding path program 55 times [2021-04-15 02:29:44,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:44,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096001927] [2021-04-15 02:29:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:44,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096001927] [2021-04-15 02:29:44,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631842588] [2021-04-15 02:29:44,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:44,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:29:44,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:44,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:44,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:29:44,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893251699] [2021-04-15 02:29:44,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:44,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:44,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:44,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:44,763 INFO L87 Difference]: Start difference. First operand 137 states and 382 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:44,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:44,853 INFO L93 Difference]: Finished difference Result 294 states and 636 transitions. [2021-04-15 02:29:44,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:29:44,854 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:44,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:44,854 INFO L225 Difference]: With dead ends: 294 [2021-04-15 02:29:44,855 INFO L226 Difference]: Without dead ends: 294 [2021-04-15 02:29:44,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:44,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-04-15 02:29:44,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 138. [2021-04-15 02:29:44,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.795620437956204) internal successors, (383), 137 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:44,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 383 transitions. [2021-04-15 02:29:44,858 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 383 transitions. Word has length 16 [2021-04-15 02:29:44,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:44,858 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 383 transitions. [2021-04-15 02:29:44,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:44,858 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 383 transitions. [2021-04-15 02:29:44,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:44,858 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:44,859 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:45,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable970,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:45,073 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:45,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:45,073 INFO L82 PathProgramCache]: Analyzing trace with hash 262929540, now seen corresponding path program 56 times [2021-04-15 02:29:45,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:45,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651331201] [2021-04-15 02:29:45,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:45,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651331201] [2021-04-15 02:29:45,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122669597] [2021-04-15 02:29:45,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:45,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:45,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:45,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 02:29:45,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:45,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:45,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:45,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:45,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:45,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:45,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:45,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:45,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:45,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203711273] [2021-04-15 02:29:45,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:45,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:45,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:45,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:45,395 INFO L87 Difference]: Start difference. First operand 138 states and 383 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:45,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:45,600 INFO L93 Difference]: Finished difference Result 156 states and 422 transitions. [2021-04-15 02:29:45,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:45,600 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:45,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:45,601 INFO L225 Difference]: With dead ends: 156 [2021-04-15 02:29:45,601 INFO L226 Difference]: Without dead ends: 151 [2021-04-15 02:29:45,601 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:45,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-04-15 02:29:45,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2021-04-15 02:29:45,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8043478260869565) internal successors, (387), 138 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:45,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 387 transitions. [2021-04-15 02:29:45,603 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 387 transitions. Word has length 16 [2021-04-15 02:29:45,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:45,603 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 387 transitions. [2021-04-15 02:29:45,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:45,603 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 387 transitions. [2021-04-15 02:29:45,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:45,604 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:45,604 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:45,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable971 [2021-04-15 02:29:45,821 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:45,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:45,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1196393249, now seen corresponding path program 57 times [2021-04-15 02:29:45,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:45,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357869494] [2021-04-15 02:29:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:45,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357869494] [2021-04-15 02:29:45,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036572022] [2021-04-15 02:29:45,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:45,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:29:45,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:45,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:29:45,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:29:45,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:45,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:29:45,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324987437] [2021-04-15 02:29:45,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:29:45,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:45,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:29:45,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:29:45,901 INFO L87 Difference]: Start difference. First operand 139 states and 387 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:45,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:45,931 INFO L93 Difference]: Finished difference Result 241 states and 571 transitions. [2021-04-15 02:29:45,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:29:45,931 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:45,932 INFO L225 Difference]: With dead ends: 241 [2021-04-15 02:29:45,932 INFO L226 Difference]: Without dead ends: 241 [2021-04-15 02:29:45,932 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:45,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-04-15 02:29:45,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 156. [2021-04-15 02:29:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8516129032258064) internal successors, (442), 155 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:45,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 442 transitions. [2021-04-15 02:29:45,937 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 442 transitions. Word has length 16 [2021-04-15 02:29:45,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:45,938 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 442 transitions. [2021-04-15 02:29:45,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:45,938 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 442 transitions. [2021-04-15 02:29:45,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:45,938 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:45,938 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:46,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable996 [2021-04-15 02:29:46,160 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:46,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:46,160 INFO L82 PathProgramCache]: Analyzing trace with hash -864466553, now seen corresponding path program 58 times [2021-04-15 02:29:46,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:46,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674185671] [2021-04-15 02:29:46,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:46,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674185671] [2021-04-15 02:29:46,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12831240] [2021-04-15 02:29:46,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:29:46,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:46,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:46,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:29:46,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:46,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:46,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:29:46,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075309679] [2021-04-15 02:29:46,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:46,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:46,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:46,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:46,261 INFO L87 Difference]: Start difference. First operand 156 states and 442 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:46,323 INFO L93 Difference]: Finished difference Result 263 states and 603 transitions. [2021-04-15 02:29:46,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:29:46,323 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:46,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:46,324 INFO L225 Difference]: With dead ends: 263 [2021-04-15 02:29:46,324 INFO L226 Difference]: Without dead ends: 263 [2021-04-15 02:29:46,324 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:46,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-04-15 02:29:46,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 145. [2021-04-15 02:29:46,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8125) internal successors, (405), 144 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 405 transitions. [2021-04-15 02:29:46,328 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 405 transitions. Word has length 16 [2021-04-15 02:29:46,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:46,328 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 405 transitions. [2021-04-15 02:29:46,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,328 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 405 transitions. [2021-04-15 02:29:46,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:46,328 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:46,328 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:46,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-04-15 02:29:46,545 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:46,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:46,545 INFO L82 PathProgramCache]: Analyzing trace with hash -326610975, now seen corresponding path program 59 times [2021-04-15 02:29:46,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:46,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591054522] [2021-04-15 02:29:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:46,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591054522] [2021-04-15 02:29:46,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305430501] [2021-04-15 02:29:46,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:46,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:29:46,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:46,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:29:46,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:46,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:46,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:29:46,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77290694] [2021-04-15 02:29:46,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:46,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:46,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:46,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:46,641 INFO L87 Difference]: Start difference. First operand 145 states and 405 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:46,730 INFO L93 Difference]: Finished difference Result 279 states and 612 transitions. [2021-04-15 02:29:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:29:46,730 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:46,731 INFO L225 Difference]: With dead ends: 279 [2021-04-15 02:29:46,731 INFO L226 Difference]: Without dead ends: 279 [2021-04-15 02:29:46,731 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:46,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-04-15 02:29:46,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 139. [2021-04-15 02:29:46,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.7971014492753623) internal successors, (386), 138 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 386 transitions. [2021-04-15 02:29:46,734 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 386 transitions. Word has length 16 [2021-04-15 02:29:46,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:46,734 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 386 transitions. [2021-04-15 02:29:46,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,734 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 386 transitions. [2021-04-15 02:29:46,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:46,735 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:46,735 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:46,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable998,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:46,949 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:46,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:46,949 INFO L82 PathProgramCache]: Analyzing trace with hash -832957241, now seen corresponding path program 60 times [2021-04-15 02:29:46,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:46,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570720347] [2021-04-15 02:29:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:46,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570720347] [2021-04-15 02:29:46,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057153198] [2021-04-15 02:29:46,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:46,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:29:46,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:46,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:29:46,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:47,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:47,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:29:47,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133966410] [2021-04-15 02:29:47,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:47,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:47,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:47,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:47,029 INFO L87 Difference]: Start difference. First operand 139 states and 386 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:47,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:47,140 INFO L93 Difference]: Finished difference Result 234 states and 545 transitions. [2021-04-15 02:29:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:47,140 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:47,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:47,141 INFO L225 Difference]: With dead ends: 234 [2021-04-15 02:29:47,141 INFO L226 Difference]: Without dead ends: 234 [2021-04-15 02:29:47,141 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:47,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-04-15 02:29:47,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 137. [2021-04-15 02:29:47,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.7941176470588234) internal successors, (380), 136 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 380 transitions. [2021-04-15 02:29:47,144 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 380 transitions. Word has length 16 [2021-04-15 02:29:47,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:47,144 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 380 transitions. [2021-04-15 02:29:47,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 380 transitions. [2021-04-15 02:29:47,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:47,144 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:47,144 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:47,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable999,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:47,345 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:47,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:47,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1004527638, now seen corresponding path program 61 times [2021-04-15 02:29:47,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:47,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580925177] [2021-04-15 02:29:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:47,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580925177] [2021-04-15 02:29:47,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626603232] [2021-04-15 02:29:47,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:47,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 02:29:47,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:47,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:47,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:47,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:47,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:47,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:47,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:47,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:47,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:47,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009097633] [2021-04-15 02:29:47,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:47,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:47,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:47,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:47,642 INFO L87 Difference]: Start difference. First operand 137 states and 380 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:47,837 INFO L93 Difference]: Finished difference Result 184 states and 502 transitions. [2021-04-15 02:29:47,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:47,838 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:47,838 INFO L225 Difference]: With dead ends: 184 [2021-04-15 02:29:47,838 INFO L226 Difference]: Without dead ends: 179 [2021-04-15 02:29:47,838 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 169.6ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:47,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-04-15 02:29:47,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 151. [2021-04-15 02:29:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8733333333333335) internal successors, (431), 150 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:47,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 431 transitions. [2021-04-15 02:29:47,841 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 431 transitions. Word has length 16 [2021-04-15 02:29:47,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:47,841 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 431 transitions. [2021-04-15 02:29:47,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 431 transitions. [2021-04-15 02:29:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:47,842 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:47,842 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:48,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1000 [2021-04-15 02:29:48,062 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:48,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:48,062 INFO L82 PathProgramCache]: Analyzing trace with hash 590199854, now seen corresponding path program 62 times [2021-04-15 02:29:48,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:48,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008627463] [2021-04-15 02:29:48,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:48,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008627463] [2021-04-15 02:29:48,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248008915] [2021-04-15 02:29:48,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:48,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:48,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:48,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 02:29:48,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:48,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:48,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:29:48,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:48,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:48,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:48,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:29:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:48,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:48,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 02:29:48,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471018071] [2021-04-15 02:29:48,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:48,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:48,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:48,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:48,363 INFO L87 Difference]: Start difference. First operand 151 states and 431 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:48,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:48,657 INFO L93 Difference]: Finished difference Result 197 states and 515 transitions. [2021-04-15 02:29:48,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:29:48,657 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:48,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:48,658 INFO L225 Difference]: With dead ends: 197 [2021-04-15 02:29:48,658 INFO L226 Difference]: Without dead ends: 192 [2021-04-15 02:29:48,658 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:29:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-04-15 02:29:48,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 151. [2021-04-15 02:29:48,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8733333333333335) internal successors, (431), 150 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:48,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 431 transitions. [2021-04-15 02:29:48,660 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 431 transitions. Word has length 16 [2021-04-15 02:29:48,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:48,660 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 431 transitions. [2021-04-15 02:29:48,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:48,661 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 431 transitions. [2021-04-15 02:29:48,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:48,661 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:48,661 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:48,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-04-15 02:29:48,882 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:48,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:48,882 INFO L82 PathProgramCache]: Analyzing trace with hash -71063929, now seen corresponding path program 63 times [2021-04-15 02:29:48,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:48,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991736800] [2021-04-15 02:29:48,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:48,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991736800] [2021-04-15 02:29:48,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457152352] [2021-04-15 02:29:48,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:48,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:29:48,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:48,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:29:48,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:48,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:48,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:29:48,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835578416] [2021-04-15 02:29:48,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:48,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:48,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:48,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:48,973 INFO L87 Difference]: Start difference. First operand 151 states and 431 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:49,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:49,015 INFO L93 Difference]: Finished difference Result 269 states and 624 transitions. [2021-04-15 02:29:49,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:29:49,015 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:49,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:49,016 INFO L225 Difference]: With dead ends: 269 [2021-04-15 02:29:49,016 INFO L226 Difference]: Without dead ends: 269 [2021-04-15 02:29:49,016 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:49,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-04-15 02:29:49,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 158. [2021-04-15 02:29:49,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8980891719745223) internal successors, (455), 157 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:49,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 455 transitions. [2021-04-15 02:29:49,018 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 455 transitions. Word has length 16 [2021-04-15 02:29:49,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:49,019 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 455 transitions. [2021-04-15 02:29:49,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:49,019 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 455 transitions. [2021-04-15 02:29:49,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:49,019 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:49,019 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:49,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1067 [2021-04-15 02:29:49,219 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:49,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:49,220 INFO L82 PathProgramCache]: Analyzing trace with hash -2131923731, now seen corresponding path program 64 times [2021-04-15 02:29:49,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:49,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854423153] [2021-04-15 02:29:49,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:49,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854423153] [2021-04-15 02:29:49,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146787441] [2021-04-15 02:29:49,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:49,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:49,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:49,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:29:49,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:49,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:49,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:49,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:29:49,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340518902] [2021-04-15 02:29:49,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:49,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:49,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:49,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:49,294 INFO L87 Difference]: Start difference. First operand 158 states and 455 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:49,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:49,338 INFO L93 Difference]: Finished difference Result 244 states and 614 transitions. [2021-04-15 02:29:49,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:29:49,338 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:49,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:49,339 INFO L225 Difference]: With dead ends: 244 [2021-04-15 02:29:49,339 INFO L226 Difference]: Without dead ends: 244 [2021-04-15 02:29:49,339 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:49,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-04-15 02:29:49,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 175. [2021-04-15 02:29:49,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.9195402298850577) internal successors, (508), 174 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:49,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 508 transitions. [2021-04-15 02:29:49,342 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 508 transitions. Word has length 16 [2021-04-15 02:29:49,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:49,343 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 508 transitions. [2021-04-15 02:29:49,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:49,343 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 508 transitions. [2021-04-15 02:29:49,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:49,343 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:49,343 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:49,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1068 [2021-04-15 02:29:49,557 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:49,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:49,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1594068153, now seen corresponding path program 65 times [2021-04-15 02:29:49,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:49,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830349825] [2021-04-15 02:29:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:49,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830349825] [2021-04-15 02:29:49,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127768745] [2021-04-15 02:29:49,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:49,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:29:49,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:49,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:29:49,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:49,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:49,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:29:49,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196086837] [2021-04-15 02:29:49,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:49,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:49,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:49,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:49,639 INFO L87 Difference]: Start difference. First operand 175 states and 508 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:49,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:49,716 INFO L93 Difference]: Finished difference Result 268 states and 649 transitions. [2021-04-15 02:29:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:29:49,716 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:49,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:49,717 INFO L225 Difference]: With dead ends: 268 [2021-04-15 02:29:49,717 INFO L226 Difference]: Without dead ends: 268 [2021-04-15 02:29:49,717 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:49,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-04-15 02:29:49,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 172. [2021-04-15 02:29:49,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.912280701754386) internal successors, (498), 171 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:49,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 498 transitions. [2021-04-15 02:29:49,720 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 498 transitions. Word has length 16 [2021-04-15 02:29:49,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:49,720 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 498 transitions. [2021-04-15 02:29:49,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:49,720 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 498 transitions. [2021-04-15 02:29:49,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:49,721 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:49,721 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:49,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1069,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:49,937 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:49,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:49,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2100414419, now seen corresponding path program 66 times [2021-04-15 02:29:49,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:49,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438047086] [2021-04-15 02:29:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:49,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438047086] [2021-04-15 02:29:49,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236918776] [2021-04-15 02:29:49,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:49,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:29:49,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:49,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:29:49,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:50,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:50,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:29:50,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094076955] [2021-04-15 02:29:50,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:50,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:50,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:50,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:50,024 INFO L87 Difference]: Start difference. First operand 172 states and 498 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:50,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:50,118 INFO L93 Difference]: Finished difference Result 237 states and 603 transitions. [2021-04-15 02:29:50,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:29:50,119 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:50,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:50,119 INFO L225 Difference]: With dead ends: 237 [2021-04-15 02:29:50,119 INFO L226 Difference]: Without dead ends: 237 [2021-04-15 02:29:50,120 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:50,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-04-15 02:29:50,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 172. [2021-04-15 02:29:50,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.912280701754386) internal successors, (498), 171 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:50,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 498 transitions. [2021-04-15 02:29:50,122 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 498 transitions. Word has length 16 [2021-04-15 02:29:50,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:50,122 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 498 transitions. [2021-04-15 02:29:50,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:50,123 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 498 transitions. [2021-04-15 02:29:50,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:29:50,123 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:50,123 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:50,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1070 [2021-04-15 02:29:50,339 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:50,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:50,339 INFO L82 PathProgramCache]: Analyzing trace with hash -617279481, now seen corresponding path program 67 times [2021-04-15 02:29:50,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:50,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706926024] [2021-04-15 02:29:50,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:50,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706926024] [2021-04-15 02:29:50,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788290769] [2021-04-15 02:29:50,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:50,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:29:50,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:50,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:50,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:29:50,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457895500] [2021-04-15 02:29:50,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:50,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:50,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:50,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:50,428 INFO L87 Difference]: Start difference. First operand 172 states and 498 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:50,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:50,530 INFO L93 Difference]: Finished difference Result 261 states and 681 transitions. [2021-04-15 02:29:50,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:29:50,530 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:29:50,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:50,531 INFO L225 Difference]: With dead ends: 261 [2021-04-15 02:29:50,531 INFO L226 Difference]: Without dead ends: 261 [2021-04-15 02:29:50,531 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:29:50,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-04-15 02:29:50,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 179. [2021-04-15 02:29:50,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.9157303370786516) internal successors, (519), 178 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:50,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 519 transitions. [2021-04-15 02:29:50,534 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 519 transitions. Word has length 16 [2021-04-15 02:29:50,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:50,534 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 519 transitions. [2021-04-15 02:29:50,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:50,534 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 519 transitions. [2021-04-15 02:29:50,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:50,534 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:50,534 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:50,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:50,735 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:50,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:50,735 INFO L82 PathProgramCache]: Analyzing trace with hash 467715592, now seen corresponding path program 68 times [2021-04-15 02:29:50,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:50,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129392334] [2021-04-15 02:29:50,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:50,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129392334] [2021-04-15 02:29:50,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898883302] [2021-04-15 02:29:50,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:50,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:50,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:50,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:50,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:50,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:50,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:29:50,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527410676] [2021-04-15 02:29:50,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:50,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:50,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:50,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:50,838 INFO L87 Difference]: Start difference. First operand 179 states and 519 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:50,913 INFO L93 Difference]: Finished difference Result 282 states and 694 transitions. [2021-04-15 02:29:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:29:50,913 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:50,914 INFO L225 Difference]: With dead ends: 282 [2021-04-15 02:29:50,914 INFO L226 Difference]: Without dead ends: 282 [2021-04-15 02:29:50,915 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:50,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-04-15 02:29:50,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 190. [2021-04-15 02:29:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9523809523809526) internal successors, (558), 189 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:50,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 558 transitions. [2021-04-15 02:29:50,918 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 558 transitions. Word has length 17 [2021-04-15 02:29:50,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:50,918 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 558 transitions. [2021-04-15 02:29:50,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:50,918 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 558 transitions. [2021-04-15 02:29:50,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:50,918 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:50,918 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:51,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1072,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:51,119 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:51,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:51,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1312212869, now seen corresponding path program 69 times [2021-04-15 02:29:51,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:51,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401084462] [2021-04-15 02:29:51,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:51,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401084462] [2021-04-15 02:29:51,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536669289] [2021-04-15 02:29:51,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:51,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:29:51,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:51,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:51,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:51,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:51,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:29:51,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387714652] [2021-04-15 02:29:51,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:51,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:51,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:51,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:51,208 INFO L87 Difference]: Start difference. First operand 190 states and 558 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:51,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:51,339 INFO L93 Difference]: Finished difference Result 315 states and 767 transitions. [2021-04-15 02:29:51,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:29:51,339 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:51,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:51,340 INFO L225 Difference]: With dead ends: 315 [2021-04-15 02:29:51,340 INFO L226 Difference]: Without dead ends: 308 [2021-04-15 02:29:51,340 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:29:51,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-04-15 02:29:51,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 196. [2021-04-15 02:29:51,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.933333333333333) internal successors, (572), 195 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:51,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 572 transitions. [2021-04-15 02:29:51,344 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 572 transitions. Word has length 17 [2021-04-15 02:29:51,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:51,344 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 572 transitions. [2021-04-15 02:29:51,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:51,344 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 572 transitions. [2021-04-15 02:29:51,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:51,345 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:51,345 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:51,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1073,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:51,557 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:51,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:51,557 INFO L82 PathProgramCache]: Analyzing trace with hash 853916706, now seen corresponding path program 70 times [2021-04-15 02:29:51,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:51,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288132182] [2021-04-15 02:29:51,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:51,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288132182] [2021-04-15 02:29:51,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722327766] [2021-04-15 02:29:51,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:51,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:51,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:51,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:51,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:51,638 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:51,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:51,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:29:51,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103417630] [2021-04-15 02:29:51,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:51,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:51,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:51,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:51,639 INFO L87 Difference]: Start difference. First operand 196 states and 572 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:51,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:51,740 INFO L93 Difference]: Finished difference Result 233 states and 626 transitions. [2021-04-15 02:29:51,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:51,740 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:51,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:51,741 INFO L225 Difference]: With dead ends: 233 [2021-04-15 02:29:51,741 INFO L226 Difference]: Without dead ends: 229 [2021-04-15 02:29:51,741 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:51,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-04-15 02:29:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 198. [2021-04-15 02:29:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9035532994923856) internal successors, (572), 197 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 572 transitions. [2021-04-15 02:29:51,744 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 572 transitions. Word has length 17 [2021-04-15 02:29:51,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:51,744 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 572 transitions. [2021-04-15 02:29:51,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:51,744 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 572 transitions. [2021-04-15 02:29:51,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:51,745 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:51,745 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:51,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1074,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:51,949 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:51,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:51,949 INFO L82 PathProgramCache]: Analyzing trace with hash 192652923, now seen corresponding path program 71 times [2021-04-15 02:29:51,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:51,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413779755] [2021-04-15 02:29:51,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:51,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413779755] [2021-04-15 02:29:51,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293527738] [2021-04-15 02:29:51,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:52,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:29:52,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:52,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:52,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:52,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:52,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:29:52,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826592756] [2021-04-15 02:29:52,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:52,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:52,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:52,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:52,046 INFO L87 Difference]: Start difference. First operand 198 states and 572 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:52,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:52,118 INFO L93 Difference]: Finished difference Result 310 states and 743 transitions. [2021-04-15 02:29:52,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:29:52,118 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:52,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:52,119 INFO L225 Difference]: With dead ends: 310 [2021-04-15 02:29:52,119 INFO L226 Difference]: Without dead ends: 310 [2021-04-15 02:29:52,119 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:52,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-04-15 02:29:52,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 188. [2021-04-15 02:29:52,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.855614973262032) internal successors, (534), 187 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:52,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 534 transitions. [2021-04-15 02:29:52,122 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 534 transitions. Word has length 17 [2021-04-15 02:29:52,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:52,123 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 534 transitions. [2021-04-15 02:29:52,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:52,123 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 534 transitions. [2021-04-15 02:29:52,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:52,123 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:52,123 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:52,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1075,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:52,337 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:52,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:52,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2007436600, now seen corresponding path program 72 times [2021-04-15 02:29:52,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:52,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063787655] [2021-04-15 02:29:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:52,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063787655] [2021-04-15 02:29:52,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679192674] [2021-04-15 02:29:52,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:52,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:29:52,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:52,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:52,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:52,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:52,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:29:52,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635513616] [2021-04-15 02:29:52,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:52,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:52,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:52,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:52,431 INFO L87 Difference]: Start difference. First operand 188 states and 534 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:52,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:52,507 INFO L93 Difference]: Finished difference Result 256 states and 671 transitions. [2021-04-15 02:29:52,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:52,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:52,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:52,508 INFO L225 Difference]: With dead ends: 256 [2021-04-15 02:29:52,508 INFO L226 Difference]: Without dead ends: 252 [2021-04-15 02:29:52,508 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:52,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-04-15 02:29:52,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 197. [2021-04-15 02:29:52,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8469387755102042) internal successors, (558), 196 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:52,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 558 transitions. [2021-04-15 02:29:52,511 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 558 transitions. Word has length 17 [2021-04-15 02:29:52,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:52,511 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 558 transitions. [2021-04-15 02:29:52,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:52,511 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 558 transitions. [2021-04-15 02:29:52,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:52,511 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:52,511 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:52,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:52,712 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:52,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:52,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1330351301, now seen corresponding path program 73 times [2021-04-15 02:29:52,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:52,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586285582] [2021-04-15 02:29:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:52,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:52,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586285582] [2021-04-15 02:29:52,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892336926] [2021-04-15 02:29:52,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:52,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:52,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:52,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:52,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:29:52,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885478764] [2021-04-15 02:29:52,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:52,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:52,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:52,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:52,808 INFO L87 Difference]: Start difference. First operand 197 states and 558 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:52,872 INFO L93 Difference]: Finished difference Result 333 states and 786 transitions. [2021-04-15 02:29:52,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:29:52,872 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:52,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:52,873 INFO L225 Difference]: With dead ends: 333 [2021-04-15 02:29:52,873 INFO L226 Difference]: Without dead ends: 333 [2021-04-15 02:29:52,873 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:29:52,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-04-15 02:29:52,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 199. [2021-04-15 02:29:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.8535353535353534) internal successors, (565), 198 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 565 transitions. [2021-04-15 02:29:52,877 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 565 transitions. Word has length 17 [2021-04-15 02:29:52,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:52,877 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 565 transitions. [2021-04-15 02:29:52,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:52,877 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 565 transitions. [2021-04-15 02:29:52,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:52,878 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:52,878 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:53,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1077 [2021-04-15 02:29:53,093 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:53,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:53,093 INFO L82 PathProgramCache]: Analyzing trace with hash -888152350, now seen corresponding path program 74 times [2021-04-15 02:29:53,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:53,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713684730] [2021-04-15 02:29:53,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:53,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713684730] [2021-04-15 02:29:53,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578710486] [2021-04-15 02:29:53,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:29:53,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:53,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:53,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:53,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:53,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:53,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:53,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919768678] [2021-04-15 02:29:53,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:53,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:53,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:53,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:53,192 INFO L87 Difference]: Start difference. First operand 199 states and 565 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:53,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:53,278 INFO L93 Difference]: Finished difference Result 260 states and 680 transitions. [2021-04-15 02:29:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:29:53,278 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:53,279 INFO L225 Difference]: With dead ends: 260 [2021-04-15 02:29:53,279 INFO L226 Difference]: Without dead ends: 254 [2021-04-15 02:29:53,280 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:29:53,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-04-15 02:29:53,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 201. [2021-04-15 02:29:53,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.835) internal successors, (567), 200 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:53,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 567 transitions. [2021-04-15 02:29:53,283 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 567 transitions. Word has length 17 [2021-04-15 02:29:53,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:53,283 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 567 transitions. [2021-04-15 02:29:53,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:53,283 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 567 transitions. [2021-04-15 02:29:53,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:53,284 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:53,284 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:53,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1078 [2021-04-15 02:29:53,501 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:53,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:53,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1298841989, now seen corresponding path program 75 times [2021-04-15 02:29:53,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:53,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115366753] [2021-04-15 02:29:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:53,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115366753] [2021-04-15 02:29:53,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351508501] [2021-04-15 02:29:53,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:53,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:29:53,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:53,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:53,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:53,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:53,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:53,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494030536] [2021-04-15 02:29:53,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:53,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:53,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:53,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:53,607 INFO L87 Difference]: Start difference. First operand 201 states and 567 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:53,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:53,693 INFO L93 Difference]: Finished difference Result 348 states and 819 transitions. [2021-04-15 02:29:53,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:29:53,694 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:53,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:53,695 INFO L225 Difference]: With dead ends: 348 [2021-04-15 02:29:53,695 INFO L226 Difference]: Without dead ends: 348 [2021-04-15 02:29:53,695 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:53,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-04-15 02:29:53,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 201. [2021-04-15 02:29:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.835) internal successors, (567), 200 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 567 transitions. [2021-04-15 02:29:53,698 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 567 transitions. Word has length 17 [2021-04-15 02:29:53,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:53,698 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 567 transitions. [2021-04-15 02:29:53,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:53,699 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 567 transitions. [2021-04-15 02:29:53,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:53,699 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:53,699 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:53,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-04-15 02:29:53,909 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:53,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:53,909 INFO L82 PathProgramCache]: Analyzing trace with hash 773833464, now seen corresponding path program 76 times [2021-04-15 02:29:53,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:53,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60797751] [2021-04-15 02:29:53,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:53,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60797751] [2021-04-15 02:29:53,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12315870] [2021-04-15 02:29:53,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:53,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:53,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:53,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:53,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:29:53,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:53,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:29:53,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135763340] [2021-04-15 02:29:53,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:29:53,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:53,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:29:53,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:29:53,985 INFO L87 Difference]: Start difference. First operand 201 states and 567 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:54,022 INFO L93 Difference]: Finished difference Result 328 states and 825 transitions. [2021-04-15 02:29:54,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:29:54,023 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:54,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:54,024 INFO L225 Difference]: With dead ends: 328 [2021-04-15 02:29:54,024 INFO L226 Difference]: Without dead ends: 328 [2021-04-15 02:29:54,024 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:54,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-04-15 02:29:54,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 216. [2021-04-15 02:29:54,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.902325581395349) internal successors, (624), 215 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 624 transitions. [2021-04-15 02:29:54,027 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 624 transitions. Word has length 17 [2021-04-15 02:29:54,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:54,027 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 624 transitions. [2021-04-15 02:29:54,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,027 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 624 transitions. [2021-04-15 02:29:54,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:54,028 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:54,028 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:54,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1080 [2021-04-15 02:29:54,241 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:54,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:54,241 INFO L82 PathProgramCache]: Analyzing trace with hash 854963749, now seen corresponding path program 77 times [2021-04-15 02:29:54,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:54,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814298959] [2021-04-15 02:29:54,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:54,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814298959] [2021-04-15 02:29:54,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787740684] [2021-04-15 02:29:54,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:54,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:29:54,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:54,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:54,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:29:54,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:54,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-04-15 02:29:54,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953756801] [2021-04-15 02:29:54,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:29:54,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:54,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:29:54,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:29:54,333 INFO L87 Difference]: Start difference. First operand 216 states and 624 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:54,420 INFO L93 Difference]: Finished difference Result 306 states and 770 transitions. [2021-04-15 02:29:54,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:29:54,421 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:54,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:54,422 INFO L225 Difference]: With dead ends: 306 [2021-04-15 02:29:54,422 INFO L226 Difference]: Without dead ends: 304 [2021-04-15 02:29:54,422 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:54,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-04-15 02:29:54,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 226. [2021-04-15 02:29:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.92) internal successors, (657), 225 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 657 transitions. [2021-04-15 02:29:54,426 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 657 transitions. Word has length 17 [2021-04-15 02:29:54,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:54,426 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 657 transitions. [2021-04-15 02:29:54,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,426 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 657 transitions. [2021-04-15 02:29:54,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:54,427 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:54,427 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:54,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1081,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:54,649 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:54,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:54,649 INFO L82 PathProgramCache]: Analyzing trace with hash -353562629, now seen corresponding path program 78 times [2021-04-15 02:29:54,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:54,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727018720] [2021-04-15 02:29:54,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:54,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727018720] [2021-04-15 02:29:54,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944768175] [2021-04-15 02:29:54,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:54,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:29:54,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:54,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:54,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:54,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:54,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:29:54,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971124178] [2021-04-15 02:29:54,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:54,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:54,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:54,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:54,730 INFO L87 Difference]: Start difference. First operand 226 states and 657 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:54,783 INFO L93 Difference]: Finished difference Result 312 states and 782 transitions. [2021-04-15 02:29:54,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:29:54,784 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:54,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:54,785 INFO L225 Difference]: With dead ends: 312 [2021-04-15 02:29:54,785 INFO L226 Difference]: Without dead ends: 312 [2021-04-15 02:29:54,785 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:54,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-04-15 02:29:54,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 225. [2021-04-15 02:29:54,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.9151785714285716) internal successors, (653), 224 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 653 transitions. [2021-04-15 02:29:54,788 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 653 transitions. Word has length 17 [2021-04-15 02:29:54,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:54,788 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 653 transitions. [2021-04-15 02:29:54,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,788 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 653 transitions. [2021-04-15 02:29:54,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:54,788 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:54,788 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:54,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1082 [2021-04-15 02:29:54,989 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:54,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:54,989 INFO L82 PathProgramCache]: Analyzing trace with hash 594982588, now seen corresponding path program 79 times [2021-04-15 02:29:54,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:54,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031781709] [2021-04-15 02:29:54,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:55,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031781709] [2021-04-15 02:29:55,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090190844] [2021-04-15 02:29:55,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:55,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:55,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:55,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:55,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:55,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42164394] [2021-04-15 02:29:55,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:55,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:55,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:55,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:55,072 INFO L87 Difference]: Start difference. First operand 225 states and 653 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:55,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:55,150 INFO L93 Difference]: Finished difference Result 311 states and 814 transitions. [2021-04-15 02:29:55,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:55,150 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:55,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:55,151 INFO L225 Difference]: With dead ends: 311 [2021-04-15 02:29:55,151 INFO L226 Difference]: Without dead ends: 299 [2021-04-15 02:29:55,151 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:55,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-04-15 02:29:55,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 227. [2021-04-15 02:29:55,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.898230088495575) internal successors, (655), 226 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:55,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 655 transitions. [2021-04-15 02:29:55,154 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 655 transitions. Word has length 17 [2021-04-15 02:29:55,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:55,155 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 655 transitions. [2021-04-15 02:29:55,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:55,155 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 655 transitions. [2021-04-15 02:29:55,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:55,155 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:55,155 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:55,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1083,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:55,358 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:55,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:55,359 INFO L82 PathProgramCache]: Analyzing trace with hash 184292949, now seen corresponding path program 80 times [2021-04-15 02:29:55,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:55,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451165812] [2021-04-15 02:29:55,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:55,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451165812] [2021-04-15 02:29:55,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915013460] [2021-04-15 02:29:55,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:55,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:55,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:55,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:55,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:55,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:55,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:55,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866470802] [2021-04-15 02:29:55,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:55,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:55,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:55,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:55,455 INFO L87 Difference]: Start difference. First operand 227 states and 655 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:55,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:55,541 INFO L93 Difference]: Finished difference Result 338 states and 826 transitions. [2021-04-15 02:29:55,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:29:55,541 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:55,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:55,542 INFO L225 Difference]: With dead ends: 338 [2021-04-15 02:29:55,542 INFO L226 Difference]: Without dead ends: 338 [2021-04-15 02:29:55,542 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:55,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-04-15 02:29:55,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 227. [2021-04-15 02:29:55,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.898230088495575) internal successors, (655), 226 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:55,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 655 transitions. [2021-04-15 02:29:55,547 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 655 transitions. Word has length 17 [2021-04-15 02:29:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:55,547 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 655 transitions. [2021-04-15 02:29:55,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:55,547 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 655 transitions. [2021-04-15 02:29:55,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:55,547 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:55,548 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:55,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1084,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:55,768 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:55,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:55,768 INFO L82 PathProgramCache]: Analyzing trace with hash -457096584, now seen corresponding path program 81 times [2021-04-15 02:29:55,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:55,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022942136] [2021-04-15 02:29:55,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:55,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022942136] [2021-04-15 02:29:55,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107230402] [2021-04-15 02:29:55,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:55,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:29:55,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:55,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:55,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:55,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:55,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:29:55,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873447887] [2021-04-15 02:29:55,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:55,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:55,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:55,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:55,857 INFO L87 Difference]: Start difference. First operand 227 states and 655 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:55,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:55,942 INFO L93 Difference]: Finished difference Result 329 states and 850 transitions. [2021-04-15 02:29:55,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:55,942 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:55,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:55,943 INFO L225 Difference]: With dead ends: 329 [2021-04-15 02:29:55,943 INFO L226 Difference]: Without dead ends: 321 [2021-04-15 02:29:55,943 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:55,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-04-15 02:29:55,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 231. [2021-04-15 02:29:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.878260869565217) internal successors, (662), 230 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 662 transitions. [2021-04-15 02:29:55,947 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 662 transitions. Word has length 17 [2021-04-15 02:29:55,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:55,947 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 662 transitions. [2021-04-15 02:29:55,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:55,947 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 662 transitions. [2021-04-15 02:29:55,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:55,948 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:55,948 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:56,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:56,161 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:56,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:56,161 INFO L82 PathProgramCache]: Analyzing trace with hash -322053317, now seen corresponding path program 82 times [2021-04-15 02:29:56,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:56,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824782752] [2021-04-15 02:29:56,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:56,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824782752] [2021-04-15 02:29:56,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838002288] [2021-04-15 02:29:56,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:56,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:56,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:56,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:56,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:56,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:56,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:29:56,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174350472] [2021-04-15 02:29:56,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:56,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:56,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:56,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:56,253 INFO L87 Difference]: Start difference. First operand 231 states and 662 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:56,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:56,383 INFO L93 Difference]: Finished difference Result 375 states and 902 transitions. [2021-04-15 02:29:56,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:56,383 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:56,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:56,384 INFO L225 Difference]: With dead ends: 375 [2021-04-15 02:29:56,384 INFO L226 Difference]: Without dead ends: 375 [2021-04-15 02:29:56,384 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:29:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-04-15 02:29:56,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 228. [2021-04-15 02:29:56,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.86784140969163) internal successors, (651), 227 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:56,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 651 transitions. [2021-04-15 02:29:56,390 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 651 transitions. Word has length 17 [2021-04-15 02:29:56,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:56,390 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 651 transitions. [2021-04-15 02:29:56,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:56,390 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 651 transitions. [2021-04-15 02:29:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:56,390 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:56,390 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:56,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:56,605 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:56,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:56,605 INFO L82 PathProgramCache]: Analyzing trace with hash -493623714, now seen corresponding path program 83 times [2021-04-15 02:29:56,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:56,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711727598] [2021-04-15 02:29:56,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:56,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711727598] [2021-04-15 02:29:56,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777808088] [2021-04-15 02:29:56,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:56,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:29:56,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:56,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:56,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:56,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:56,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:29:56,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951549458] [2021-04-15 02:29:56,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:56,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:56,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:56,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:56,699 INFO L87 Difference]: Start difference. First operand 228 states and 651 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:56,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:56,746 INFO L93 Difference]: Finished difference Result 391 states and 994 transitions. [2021-04-15 02:29:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:29:56,746 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:56,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:56,747 INFO L225 Difference]: With dead ends: 391 [2021-04-15 02:29:56,747 INFO L226 Difference]: Without dead ends: 391 [2021-04-15 02:29:56,747 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:56,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-04-15 02:29:56,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 256. [2021-04-15 02:29:56,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.9686274509803923) internal successors, (757), 255 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 757 transitions. [2021-04-15 02:29:56,751 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 757 transitions. Word has length 17 [2021-04-15 02:29:56,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:56,752 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 757 transitions. [2021-04-15 02:29:56,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:56,752 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 757 transitions. [2021-04-15 02:29:56,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:56,752 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:56,752 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:56,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1087,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:56,953 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:56,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:56,953 INFO L82 PathProgramCache]: Analyzing trace with hash -412493429, now seen corresponding path program 84 times [2021-04-15 02:29:56,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:56,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693729800] [2021-04-15 02:29:56,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:56,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693729800] [2021-04-15 02:29:56,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799728289] [2021-04-15 02:29:56,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:57,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:29:57,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:57,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:57,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:57,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:57,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:29:57,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115684067] [2021-04-15 02:29:57,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:57,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:57,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:57,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:57,034 INFO L87 Difference]: Start difference. First operand 256 states and 757 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:57,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:57,116 INFO L93 Difference]: Finished difference Result 374 states and 958 transitions. [2021-04-15 02:29:57,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:29:57,116 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:57,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:57,117 INFO L225 Difference]: With dead ends: 374 [2021-04-15 02:29:57,117 INFO L226 Difference]: Without dead ends: 372 [2021-04-15 02:29:57,117 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:29:57,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-04-15 02:29:57,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 269. [2021-04-15 02:29:57,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.003731343283582) internal successors, (805), 268 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:57,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 805 transitions. [2021-04-15 02:29:57,121 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 805 transitions. Word has length 17 [2021-04-15 02:29:57,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:57,121 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 805 transitions. [2021-04-15 02:29:57,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:57,121 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 805 transitions. [2021-04-15 02:29:57,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:57,121 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:57,121 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:57,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1088 [2021-04-15 02:29:57,322 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:57,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:57,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1101103778, now seen corresponding path program 85 times [2021-04-15 02:29:57,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:57,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709567784] [2021-04-15 02:29:57,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:57,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709567784] [2021-04-15 02:29:57,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331042685] [2021-04-15 02:29:57,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:57,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:57,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:57,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:57,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:29:57,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761986342] [2021-04-15 02:29:57,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:57,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:57,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:57,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:57,418 INFO L87 Difference]: Start difference. First operand 269 states and 805 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:57,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:57,523 INFO L93 Difference]: Finished difference Result 394 states and 1025 transitions. [2021-04-15 02:29:57,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:29:57,524 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:57,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:57,525 INFO L225 Difference]: With dead ends: 394 [2021-04-15 02:29:57,525 INFO L226 Difference]: Without dead ends: 392 [2021-04-15 02:29:57,525 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:29:57,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-04-15 02:29:57,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 269. [2021-04-15 02:29:57,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0) internal successors, (804), 268 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 804 transitions. [2021-04-15 02:29:57,529 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 804 transitions. Word has length 17 [2021-04-15 02:29:57,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:57,529 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 804 transitions. [2021-04-15 02:29:57,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:57,529 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 804 transitions. [2021-04-15 02:29:57,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:57,529 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:57,529 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:57,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1089 [2021-04-15 02:29:57,730 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:57,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:57,730 INFO L82 PathProgramCache]: Analyzing trace with hash 439839995, now seen corresponding path program 86 times [2021-04-15 02:29:57,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:57,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349383907] [2021-04-15 02:29:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:57,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349383907] [2021-04-15 02:29:57,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534504124] [2021-04-15 02:29:57,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:57,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:57,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:57,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:57,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:57,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:57,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:29:57,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427971813] [2021-04-15 02:29:57,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:29:57,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:57,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:29:57,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:29:57,828 INFO L87 Difference]: Start difference. First operand 269 states and 804 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:57,883 INFO L93 Difference]: Finished difference Result 362 states and 940 transitions. [2021-04-15 02:29:57,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:29:57,884 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:57,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:57,885 INFO L225 Difference]: With dead ends: 362 [2021-04-15 02:29:57,885 INFO L226 Difference]: Without dead ends: 362 [2021-04-15 02:29:57,885 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:57,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-04-15 02:29:57,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 249. [2021-04-15 02:29:57,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.963709677419355) internal successors, (735), 248 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 735 transitions. [2021-04-15 02:29:57,890 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 735 transitions. Word has length 17 [2021-04-15 02:29:57,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:57,890 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 735 transitions. [2021-04-15 02:29:57,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:57,890 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 735 transitions. [2021-04-15 02:29:57,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:57,890 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:57,891 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:58,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1090,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:58,091 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:58,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:58,091 INFO L82 PathProgramCache]: Analyzing trace with hash -672474590, now seen corresponding path program 87 times [2021-04-15 02:29:58,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:58,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895990161] [2021-04-15 02:29:58,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:58,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895990161] [2021-04-15 02:29:58,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363014870] [2021-04-15 02:29:58,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:58,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:29:58,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:58,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:58,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:58,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:58,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:58,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134967084] [2021-04-15 02:29:58,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:58,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:58,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:58,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:58,188 INFO L87 Difference]: Start difference. First operand 249 states and 735 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:58,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:58,293 INFO L93 Difference]: Finished difference Result 356 states and 958 transitions. [2021-04-15 02:29:58,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:29:58,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:58,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:58,295 INFO L225 Difference]: With dead ends: 356 [2021-04-15 02:29:58,295 INFO L226 Difference]: Without dead ends: 346 [2021-04-15 02:29:58,295 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:58,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-04-15 02:29:58,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 263. [2021-04-15 02:29:58,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.0) internal successors, (786), 262 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:58,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 786 transitions. [2021-04-15 02:29:58,299 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 786 transitions. Word has length 17 [2021-04-15 02:29:58,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:58,299 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 786 transitions. [2021-04-15 02:29:58,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:58,299 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 786 transitions. [2021-04-15 02:29:58,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:58,300 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:58,300 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:58,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1091,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:58,513 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:58,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:58,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1083164229, now seen corresponding path program 88 times [2021-04-15 02:29:58,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:58,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074270988] [2021-04-15 02:29:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:58,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074270988] [2021-04-15 02:29:58,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075872326] [2021-04-15 02:29:58,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:58,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:58,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:58,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:58,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:58,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:58,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:29:58,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041782360] [2021-04-15 02:29:58,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:29:58,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:58,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:29:58,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:29:58,593 INFO L87 Difference]: Start difference. First operand 263 states and 786 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:58,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:58,666 INFO L93 Difference]: Finished difference Result 358 states and 949 transitions. [2021-04-15 02:29:58,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:29:58,667 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:58,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:58,668 INFO L225 Difference]: With dead ends: 358 [2021-04-15 02:29:58,668 INFO L226 Difference]: Without dead ends: 358 [2021-04-15 02:29:58,668 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:58,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-04-15 02:29:58,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 264. [2021-04-15 02:29:58,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9961977186311786) internal successors, (788), 263 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:58,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 788 transitions. [2021-04-15 02:29:58,678 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 788 transitions. Word has length 17 [2021-04-15 02:29:58,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:58,678 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 788 transitions. [2021-04-15 02:29:58,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:58,678 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 788 transitions. [2021-04-15 02:29:58,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:58,678 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:58,678 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:58,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1092 [2021-04-15 02:29:58,879 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:58,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:58,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1724553762, now seen corresponding path program 89 times [2021-04-15 02:29:58,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:58,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565057090] [2021-04-15 02:29:58,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:58,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565057090] [2021-04-15 02:29:58,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534967598] [2021-04-15 02:29:58,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:58,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:29:58,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:58,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:58,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:58,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:58,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:29:58,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030576590] [2021-04-15 02:29:58,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:58,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:58,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:58,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:58,968 INFO L87 Difference]: Start difference. First operand 264 states and 788 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:59,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:59,063 INFO L93 Difference]: Finished difference Result 377 states and 1000 transitions. [2021-04-15 02:29:59,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:59,063 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:59,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:59,064 INFO L225 Difference]: With dead ends: 377 [2021-04-15 02:29:59,065 INFO L226 Difference]: Without dead ends: 369 [2021-04-15 02:29:59,065 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:59,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-04-15 02:29:59,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 264. [2021-04-15 02:29:59,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9923954372623576) internal successors, (787), 263 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:59,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 787 transitions. [2021-04-15 02:29:59,070 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 787 transitions. Word has length 17 [2021-04-15 02:29:59,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:59,070 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 787 transitions. [2021-04-15 02:29:59,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:59,070 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 787 transitions. [2021-04-15 02:29:59,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:59,070 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:59,070 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:59,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1093,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:59,285 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:59,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:59,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1589510495, now seen corresponding path program 90 times [2021-04-15 02:29:59,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:59,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713297584] [2021-04-15 02:29:59,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:59,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713297584] [2021-04-15 02:29:59,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778538755] [2021-04-15 02:29:59,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:59,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:29:59,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:59,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:59,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:59,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:59,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:29:59,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138801361] [2021-04-15 02:29:59,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:59,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:59,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:59,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:59,394 INFO L87 Difference]: Start difference. First operand 264 states and 787 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:59,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:59,520 INFO L93 Difference]: Finished difference Result 370 states and 949 transitions. [2021-04-15 02:29:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:29:59,520 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:59,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:59,521 INFO L225 Difference]: With dead ends: 370 [2021-04-15 02:29:59,521 INFO L226 Difference]: Without dead ends: 370 [2021-04-15 02:29:59,521 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:29:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-04-15 02:29:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 258. [2021-04-15 02:29:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.992217898832685) internal successors, (769), 257 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:59,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 769 transitions. [2021-04-15 02:29:59,525 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 769 transitions. Word has length 17 [2021-04-15 02:29:59,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:59,525 INFO L480 AbstractCegarLoop]: Abstraction has 258 states and 769 transitions. [2021-04-15 02:29:59,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:59,525 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 769 transitions. [2021-04-15 02:29:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:59,526 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:59,526 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:59,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1094,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:59,726 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:59,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:59,727 INFO L82 PathProgramCache]: Analyzing trace with hash 20730274, now seen corresponding path program 91 times [2021-04-15 02:29:59,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:59,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073362299] [2021-04-15 02:29:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:59,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073362299] [2021-04-15 02:29:59,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388296049] [2021-04-15 02:29:59,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:59,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:29:59,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:59,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:59,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:29:59,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108580700] [2021-04-15 02:29:59,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:29:59,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:59,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:29:59,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:29:59,835 INFO L87 Difference]: Start difference. First operand 258 states and 769 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:59,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:59,902 INFO L93 Difference]: Finished difference Result 319 states and 889 transitions. [2021-04-15 02:29:59,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:29:59,903 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:29:59,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:59,904 INFO L225 Difference]: With dead ends: 319 [2021-04-15 02:29:59,904 INFO L226 Difference]: Without dead ends: 309 [2021-04-15 02:29:59,904 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:29:59,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-04-15 02:29:59,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 258. [2021-04-15 02:29:59,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9883268482490273) internal successors, (768), 257 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:59,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 768 transitions. [2021-04-15 02:29:59,908 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 768 transitions. Word has length 17 [2021-04-15 02:29:59,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:59,908 INFO L480 AbstractCegarLoop]: Abstraction has 258 states and 768 transitions. [2021-04-15 02:29:59,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:59,908 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 768 transitions. [2021-04-15 02:29:59,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:29:59,908 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:59,908 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:00,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1095 [2021-04-15 02:30:00,129 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:00,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:00,129 INFO L82 PathProgramCache]: Analyzing trace with hash -106375557, now seen corresponding path program 92 times [2021-04-15 02:30:00,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:00,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813399151] [2021-04-15 02:30:00,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:00,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813399151] [2021-04-15 02:30:00,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348722363] [2021-04-15 02:30:00,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:00,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:00,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:00,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:30:00,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:00,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:00,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:30:00,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328875274] [2021-04-15 02:30:00,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:30:00,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:00,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:30:00,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:30:00,229 INFO L87 Difference]: Start difference. First operand 258 states and 768 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:00,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:00,364 INFO L93 Difference]: Finished difference Result 377 states and 992 transitions. [2021-04-15 02:30:00,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:30:00,365 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:30:00,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:00,365 INFO L225 Difference]: With dead ends: 377 [2021-04-15 02:30:00,365 INFO L226 Difference]: Without dead ends: 377 [2021-04-15 02:30:00,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:00,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-04-15 02:30:00,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 266. [2021-04-15 02:30:00,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.9849056603773585) internal successors, (791), 265 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:00,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 791 transitions. [2021-04-15 02:30:00,368 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 791 transitions. Word has length 17 [2021-04-15 02:30:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:00,369 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 791 transitions. [2021-04-15 02:30:00,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:00,369 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 791 transitions. [2021-04-15 02:30:00,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:30:00,369 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:00,369 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:00,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:00,569 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:00,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:00,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1130090568, now seen corresponding path program 93 times [2021-04-15 02:30:00,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:00,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691775190] [2021-04-15 02:30:00,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:00,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691775190] [2021-04-15 02:30:00,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480129736] [2021-04-15 02:30:00,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:00,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:30:00,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:00,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:30:00,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:00,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:00,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:30:00,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060568230] [2021-04-15 02:30:00,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:30:00,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:00,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:30:00,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:30:00,650 INFO L87 Difference]: Start difference. First operand 266 states and 791 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:00,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:00,697 INFO L93 Difference]: Finished difference Result 455 states and 1181 transitions. [2021-04-15 02:30:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:30:00,697 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:30:00,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:00,698 INFO L225 Difference]: With dead ends: 455 [2021-04-15 02:30:00,698 INFO L226 Difference]: Without dead ends: 455 [2021-04-15 02:30:00,698 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:30:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-04-15 02:30:00,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 307. [2021-04-15 02:30:00,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.0784313725490198) internal successors, (942), 306 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:00,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 942 transitions. [2021-04-15 02:30:00,702 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 942 transitions. Word has length 17 [2021-04-15 02:30:00,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:00,703 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 942 transitions. [2021-04-15 02:30:00,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:00,703 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 942 transitions. [2021-04-15 02:30:00,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:30:00,703 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:00,703 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:00,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1097,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:00,909 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:00,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:00,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1048960283, now seen corresponding path program 94 times [2021-04-15 02:30:00,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:00,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049371541] [2021-04-15 02:30:00,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:00,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049371541] [2021-04-15 02:30:00,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571076184] [2021-04-15 02:30:00,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:00,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:00,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:00,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:30:00,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:01,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:01,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:30:01,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275256039] [2021-04-15 02:30:01,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:30:01,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:01,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:30:01,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:30:01,005 INFO L87 Difference]: Start difference. First operand 307 states and 942 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:01,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:01,110 INFO L93 Difference]: Finished difference Result 448 states and 1182 transitions. [2021-04-15 02:30:01,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:30:01,111 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:30:01,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:01,112 INFO L225 Difference]: With dead ends: 448 [2021-04-15 02:30:01,112 INFO L226 Difference]: Without dead ends: 446 [2021-04-15 02:30:01,112 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:01,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-04-15 02:30:01,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 320. [2021-04-15 02:30:01,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.109717868338558) internal successors, (992), 319 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:01,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 992 transitions. [2021-04-15 02:30:01,116 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 992 transitions. Word has length 17 [2021-04-15 02:30:01,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:01,116 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 992 transitions. [2021-04-15 02:30:01,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:01,116 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 992 transitions. [2021-04-15 02:30:01,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:30:01,116 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:01,116 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:01,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1098,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:01,317 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:01,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:01,317 INFO L82 PathProgramCache]: Analyzing trace with hash 464636924, now seen corresponding path program 95 times [2021-04-15 02:30:01,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:01,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150694102] [2021-04-15 02:30:01,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:01,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150694102] [2021-04-15 02:30:01,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539703124] [2021-04-15 02:30:01,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:01,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:30:01,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:01,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:30:01,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:01,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:01,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:30:01,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974670311] [2021-04-15 02:30:01,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:30:01,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:01,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:30:01,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:30:01,400 INFO L87 Difference]: Start difference. First operand 320 states and 992 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:01,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:01,495 INFO L93 Difference]: Finished difference Result 458 states and 1214 transitions. [2021-04-15 02:30:01,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:30:01,496 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:30:01,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:01,496 INFO L225 Difference]: With dead ends: 458 [2021-04-15 02:30:01,496 INFO L226 Difference]: Without dead ends: 456 [2021-04-15 02:30:01,497 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:01,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-04-15 02:30:01,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 309. [2021-04-15 02:30:01,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0779220779220777) internal successors, (948), 308 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:01,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 948 transitions. [2021-04-15 02:30:01,500 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 948 transitions. Word has length 17 [2021-04-15 02:30:01,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:01,500 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 948 transitions. [2021-04-15 02:30:01,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:01,501 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 948 transitions. [2021-04-15 02:30:01,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:30:01,501 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:01,501 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:01,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1099 [2021-04-15 02:30:01,702 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:01,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:01,702 INFO L82 PathProgramCache]: Analyzing trace with hash -196626859, now seen corresponding path program 96 times [2021-04-15 02:30:01,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:01,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132779384] [2021-04-15 02:30:01,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:01,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132779384] [2021-04-15 02:30:01,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058388038] [2021-04-15 02:30:01,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:01,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:30:01,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:01,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:30:01,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:01,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:01,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:30:01,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109902606] [2021-04-15 02:30:01,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:30:01,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:01,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:30:01,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:30:01,799 INFO L87 Difference]: Start difference. First operand 309 states and 948 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:01,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:01,857 INFO L93 Difference]: Finished difference Result 433 states and 1138 transitions. [2021-04-15 02:30:01,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:30:01,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:30:01,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:01,858 INFO L225 Difference]: With dead ends: 433 [2021-04-15 02:30:01,858 INFO L226 Difference]: Without dead ends: 433 [2021-04-15 02:30:01,858 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:30:01,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-04-15 02:30:01,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 312. [2021-04-15 02:30:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0707395498392285) internal successors, (955), 311 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 955 transitions. [2021-04-15 02:30:01,862 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 955 transitions. Word has length 17 [2021-04-15 02:30:01,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:01,862 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 955 transitions. [2021-04-15 02:30:01,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 955 transitions. [2021-04-15 02:30:01,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:30:01,863 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:01,863 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:02,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1100 [2021-04-15 02:30:02,069 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:02,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:02,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1080301240, now seen corresponding path program 97 times [2021-04-15 02:30:02,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:02,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318914779] [2021-04-15 02:30:02,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:02,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318914779] [2021-04-15 02:30:02,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824869443] [2021-04-15 02:30:02,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:02,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:30:02,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:02,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:02,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:30:02,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84412921] [2021-04-15 02:30:02,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:30:02,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:02,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:30:02,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:30:02,216 INFO L87 Difference]: Start difference. First operand 312 states and 955 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:02,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:02,318 INFO L93 Difference]: Finished difference Result 472 states and 1273 transitions. [2021-04-15 02:30:02,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:30:02,319 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:30:02,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:02,320 INFO L225 Difference]: With dead ends: 472 [2021-04-15 02:30:02,320 INFO L226 Difference]: Without dead ends: 468 [2021-04-15 02:30:02,320 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:02,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-04-15 02:30:02,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 310. [2021-04-15 02:30:02,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.071197411003236) internal successors, (949), 309 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:02,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 949 transitions. [2021-04-15 02:30:02,325 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 949 transitions. Word has length 17 [2021-04-15 02:30:02,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:02,325 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 949 transitions. [2021-04-15 02:30:02,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:02,325 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 949 transitions. [2021-04-15 02:30:02,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:30:02,326 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:02,326 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:02,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1101 [2021-04-15 02:30:02,541 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:02,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:02,541 INFO L82 PathProgramCache]: Analyzing trace with hash 2037480635, now seen corresponding path program 98 times [2021-04-15 02:30:02,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:02,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981348065] [2021-04-15 02:30:02,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:02,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981348065] [2021-04-15 02:30:02,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156338859] [2021-04-15 02:30:02,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:30:02,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:02,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:02,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:30:02,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:02,658 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:02,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:02,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:30:02,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810583646] [2021-04-15 02:30:02,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:30:02,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:02,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:30:02,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:30:02,659 INFO L87 Difference]: Start difference. First operand 310 states and 949 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:02,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:02,727 INFO L93 Difference]: Finished difference Result 407 states and 1107 transitions. [2021-04-15 02:30:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:30:02,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:30:02,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:02,728 INFO L225 Difference]: With dead ends: 407 [2021-04-15 02:30:02,728 INFO L226 Difference]: Without dead ends: 407 [2021-04-15 02:30:02,728 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:30:02,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-04-15 02:30:02,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 318. [2021-04-15 02:30:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.0757097791798107) internal successors, (975), 317 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:02,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 975 transitions. [2021-04-15 02:30:02,731 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 975 transitions. Word has length 17 [2021-04-15 02:30:02,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:02,731 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 975 transitions. [2021-04-15 02:30:02,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:02,732 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 975 transitions. [2021-04-15 02:30:02,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:30:02,732 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:02,732 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:02,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1102,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:02,932 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:02,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:02,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1308941444, now seen corresponding path program 99 times [2021-04-15 02:30:02,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:02,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132086453] [2021-04-15 02:30:02,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:02,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132086453] [2021-04-15 02:30:02,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603095433] [2021-04-15 02:30:02,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:02,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:30:02,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:02,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:30:02,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:03,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:03,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:30:03,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620872279] [2021-04-15 02:30:03,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:30:03,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:03,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:30:03,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:30:03,013 INFO L87 Difference]: Start difference. First operand 318 states and 975 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:03,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:03,105 INFO L93 Difference]: Finished difference Result 452 states and 1242 transitions. [2021-04-15 02:30:03,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:30:03,105 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:30:03,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:03,106 INFO L225 Difference]: With dead ends: 452 [2021-04-15 02:30:03,106 INFO L226 Difference]: Without dead ends: 446 [2021-04-15 02:30:03,106 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:03,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-04-15 02:30:03,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 318. [2021-04-15 02:30:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.0725552050473186) internal successors, (974), 317 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:03,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 974 transitions. [2021-04-15 02:30:03,110 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 974 transitions. Word has length 17 [2021-04-15 02:30:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:03,110 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 974 transitions. [2021-04-15 02:30:03,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:03,110 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 974 transitions. [2021-04-15 02:30:03,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:30:03,110 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:03,110 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:03,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1103 [2021-04-15 02:30:03,311 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:03,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:03,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1933946680, now seen corresponding path program 100 times [2021-04-15 02:30:03,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:03,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226767699] [2021-04-15 02:30:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:03,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226767699] [2021-04-15 02:30:03,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204310277] [2021-04-15 02:30:03,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:03,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:03,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:03,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:30:03,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:03,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:03,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:30:03,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996637571] [2021-04-15 02:30:03,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:30:03,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:03,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:30:03,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:30:03,423 INFO L87 Difference]: Start difference. First operand 318 states and 974 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:03,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:03,523 INFO L93 Difference]: Finished difference Result 444 states and 1227 transitions. [2021-04-15 02:30:03,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:30:03,523 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:30:03,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:03,524 INFO L225 Difference]: With dead ends: 444 [2021-04-15 02:30:03,524 INFO L226 Difference]: Without dead ends: 436 [2021-04-15 02:30:03,524 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:30:03,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-04-15 02:30:03,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 332. [2021-04-15 02:30:03,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.090634441087613) internal successors, (1023), 331 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:03,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1023 transitions. [2021-04-15 02:30:03,528 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1023 transitions. Word has length 17 [2021-04-15 02:30:03,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:03,528 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 1023 transitions. [2021-04-15 02:30:03,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:03,528 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1023 transitions. [2021-04-15 02:30:03,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:30:03,529 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:03,529 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:03,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1104,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:03,729 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:03,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:03,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2068989947, now seen corresponding path program 101 times [2021-04-15 02:30:03,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:03,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607599314] [2021-04-15 02:30:03,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:03,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607599314] [2021-04-15 02:30:03,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278258465] [2021-04-15 02:30:03,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:03,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:30:03,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:03,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:30:03,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:03,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:03,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:30:03,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995630646] [2021-04-15 02:30:03,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:30:03,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:03,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:30:03,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:30:03,825 INFO L87 Difference]: Start difference. First operand 332 states and 1023 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:03,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:03,920 INFO L93 Difference]: Finished difference Result 419 states and 1186 transitions. [2021-04-15 02:30:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:30:03,920 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:30:03,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:03,921 INFO L225 Difference]: With dead ends: 419 [2021-04-15 02:30:03,921 INFO L226 Difference]: Without dead ends: 419 [2021-04-15 02:30:03,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:30:03,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-04-15 02:30:03,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 347. [2021-04-15 02:30:03,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0895953757225434) internal successors, (1069), 346 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1069 transitions. [2021-04-15 02:30:03,925 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1069 transitions. Word has length 17 [2021-04-15 02:30:03,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:03,925 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 1069 transitions. [2021-04-15 02:30:03,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:03,925 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1069 transitions. [2021-04-15 02:30:03,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:30:03,925 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:03,925 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:04,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1105 [2021-04-15 02:30:04,126 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:04,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:04,126 INFO L82 PathProgramCache]: Analyzing trace with hash -615736580, now seen corresponding path program 102 times [2021-04-15 02:30:04,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:04,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056423685] [2021-04-15 02:30:04,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:04,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056423685] [2021-04-15 02:30:04,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041694309] [2021-04-15 02:30:04,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:04,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:30:04,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:04,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:30:04,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:04,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:04,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:30:04,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664626094] [2021-04-15 02:30:04,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:30:04,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:04,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:30:04,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:30:04,213 INFO L87 Difference]: Start difference. First operand 347 states and 1069 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:04,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:04,273 INFO L93 Difference]: Finished difference Result 413 states and 1199 transitions. [2021-04-15 02:30:04,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:30:04,274 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:30:04,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:04,275 INFO L225 Difference]: With dead ends: 413 [2021-04-15 02:30:04,275 INFO L226 Difference]: Without dead ends: 403 [2021-04-15 02:30:04,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:30:04,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-04-15 02:30:04,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 347. [2021-04-15 02:30:04,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.086705202312139) internal successors, (1068), 346 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1068 transitions. [2021-04-15 02:30:04,280 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1068 transitions. Word has length 17 [2021-04-15 02:30:04,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:04,280 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 1068 transitions. [2021-04-15 02:30:04,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:04,280 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1068 transitions. [2021-04-15 02:30:04,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:30:04,281 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:04,281 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:04,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1106,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:04,501 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:04,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:04,501 INFO L82 PathProgramCache]: Analyzing trace with hash -742842411, now seen corresponding path program 103 times [2021-04-15 02:30:04,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:04,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431952047] [2021-04-15 02:30:04,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:04,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431952047] [2021-04-15 02:30:04,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378017535] [2021-04-15 02:30:04,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:04,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:04,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:30:04,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:04,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:04,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:30:04,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956177553] [2021-04-15 02:30:04,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:30:04,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:04,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:30:04,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:30:04,612 INFO L87 Difference]: Start difference. First operand 347 states and 1068 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:04,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:04,753 INFO L93 Difference]: Finished difference Result 418 states and 1194 transitions. [2021-04-15 02:30:04,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:30:04,754 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:30:04,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:04,754 INFO L225 Difference]: With dead ends: 418 [2021-04-15 02:30:04,755 INFO L226 Difference]: Without dead ends: 418 [2021-04-15 02:30:04,755 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:30:04,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-04-15 02:30:04,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 347. [2021-04-15 02:30:04,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.086705202312139) internal successors, (1068), 346 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:04,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1068 transitions. [2021-04-15 02:30:04,760 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1068 transitions. Word has length 17 [2021-04-15 02:30:04,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:04,760 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 1068 transitions. [2021-04-15 02:30:04,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:04,760 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1068 transitions. [2021-04-15 02:30:04,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:30:04,761 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:04,761 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:04,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1107 [2021-04-15 02:30:04,977 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:04,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:04,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1948460984, now seen corresponding path program 104 times [2021-04-15 02:30:04,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:04,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403946828] [2021-04-15 02:30:04,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:05,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403946828] [2021-04-15 02:30:05,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572599063] [2021-04-15 02:30:05,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:05,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:05,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:05,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:30:05,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:05,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:05,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:30:05,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467459753] [2021-04-15 02:30:05,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:30:05,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:05,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:30:05,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:30:05,085 INFO L87 Difference]: Start difference. First operand 347 states and 1068 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:05,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:05,134 INFO L93 Difference]: Finished difference Result 411 states and 1195 transitions. [2021-04-15 02:30:05,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:30:05,134 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:30:05,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:05,135 INFO L225 Difference]: With dead ends: 411 [2021-04-15 02:30:05,135 INFO L226 Difference]: Without dead ends: 399 [2021-04-15 02:30:05,135 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:30:05,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-04-15 02:30:05,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 345. [2021-04-15 02:30:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.0930232558139537) internal successors, (1064), 344 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1064 transitions. [2021-04-15 02:30:05,140 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1064 transitions. Word has length 17 [2021-04-15 02:30:05,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:05,141 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 1064 transitions. [2021-04-15 02:30:05,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:05,141 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1064 transitions. [2021-04-15 02:30:05,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:30:05,141 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:05,141 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:05,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1108,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:05,365 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:05,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:05,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2010299589, now seen corresponding path program 105 times [2021-04-15 02:30:05,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:05,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156936532] [2021-04-15 02:30:05,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:05,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156936532] [2021-04-15 02:30:05,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275135293] [2021-04-15 02:30:05,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:30:05,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:30:05,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:05,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:30:05,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:05,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:05,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:30:05,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13064776] [2021-04-15 02:30:05,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:30:05,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:05,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:30:05,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:30:05,493 INFO L87 Difference]: Start difference. First operand 345 states and 1064 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:05,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:05,649 INFO L93 Difference]: Finished difference Result 476 states and 1343 transitions. [2021-04-15 02:30:05,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:30:05,649 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:30:05,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:05,650 INFO L225 Difference]: With dead ends: 476 [2021-04-15 02:30:05,650 INFO L226 Difference]: Without dead ends: 476 [2021-04-15 02:30:05,651 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:30:05,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-04-15 02:30:05,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 355. [2021-04-15 02:30:05,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0819209039548023) internal successors, (1091), 354 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:05,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1091 transitions. [2021-04-15 02:30:05,657 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1091 transitions. Word has length 17 [2021-04-15 02:30:05,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:05,657 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1091 transitions. [2021-04-15 02:30:05,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:05,657 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1091 transitions. [2021-04-15 02:30:05,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:05,658 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:05,658 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:05,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1109,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:05,873 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:05,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:05,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1640906887, now seen corresponding path program 106 times [2021-04-15 02:30:05,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:05,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366718809] [2021-04-15 02:30:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:06,020 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:06,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366718809] [2021-04-15 02:30:06,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616429238] [2021-04-15 02:30:06,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:06,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:06,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:06,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:06,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:06,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:06,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:06,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:06,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:06,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:06,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:06,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:06,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:30:06,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269364677] [2021-04-15 02:30:06,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:06,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:06,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:06,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:06,618 INFO L87 Difference]: Start difference. First operand 355 states and 1091 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:06,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:06,932 INFO L93 Difference]: Finished difference Result 425 states and 1234 transitions. [2021-04-15 02:30:06,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:30:06,932 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:06,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:06,933 INFO L225 Difference]: With dead ends: 425 [2021-04-15 02:30:06,933 INFO L226 Difference]: Without dead ends: 398 [2021-04-15 02:30:06,933 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 404.3ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:30:06,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-04-15 02:30:06,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 369. [2021-04-15 02:30:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.078804347826087) internal successors, (1133), 368 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1133 transitions. [2021-04-15 02:30:06,939 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1133 transitions. Word has length 18 [2021-04-15 02:30:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:06,939 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 1133 transitions. [2021-04-15 02:30:06,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1133 transitions. [2021-04-15 02:30:06,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:06,939 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:06,939 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:07,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-04-15 02:30:07,145 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:07,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:07,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1149194617, now seen corresponding path program 107 times [2021-04-15 02:30:07,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:07,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363507425] [2021-04-15 02:30:07,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:07,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363507425] [2021-04-15 02:30:07,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697835680] [2021-04-15 02:30:07,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:07,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:30:07,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:07,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 02:30:07,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:07,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:07,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:07,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:07,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:07,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:07,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:07,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:07,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:07,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097799901] [2021-04-15 02:30:07,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:07,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:07,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:07,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:07,781 INFO L87 Difference]: Start difference. First operand 369 states and 1133 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:08,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:08,062 INFO L93 Difference]: Finished difference Result 444 states and 1291 transitions. [2021-04-15 02:30:08,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:30:08,062 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:08,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:08,063 INFO L225 Difference]: With dead ends: 444 [2021-04-15 02:30:08,063 INFO L226 Difference]: Without dead ends: 428 [2021-04-15 02:30:08,063 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 308.6ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:08,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-04-15 02:30:08,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 384. [2021-04-15 02:30:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:08,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-04-15 02:30:08,067 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 18 [2021-04-15 02:30:08,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:08,067 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-04-15 02:30:08,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:08,067 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-04-15 02:30:08,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:08,068 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:08,068 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:08,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1229 [2021-04-15 02:30:08,268 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:08,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:08,268 INFO L82 PathProgramCache]: Analyzing trace with hash -405611257, now seen corresponding path program 108 times [2021-04-15 02:30:08,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:08,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777966618] [2021-04-15 02:30:08,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:08,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777966618] [2021-04-15 02:30:08,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269905783] [2021-04-15 02:30:08,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:08,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:30:08,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:08,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:08,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:08,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:08,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:08,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:08,991 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:08,991 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:08,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:09,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:09,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:09,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:09,142 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:09,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:09,143 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:09,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:09,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:09,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701309929] [2021-04-15 02:30:09,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:09,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:09,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:09,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:09,179 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:09,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:09,519 INFO L93 Difference]: Finished difference Result 463 states and 1333 transitions. [2021-04-15 02:30:09,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:30:09,519 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:09,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:09,520 INFO L225 Difference]: With dead ends: 463 [2021-04-15 02:30:09,520 INFO L226 Difference]: Without dead ends: 453 [2021-04-15 02:30:09,520 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 313.7ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:09,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-04-15 02:30:09,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 384. [2021-04-15 02:30:09,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-04-15 02:30:09,524 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 18 [2021-04-15 02:30:09,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:09,524 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-04-15 02:30:09,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:09,525 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-04-15 02:30:09,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:09,525 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:09,525 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:09,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1320 [2021-04-15 02:30:09,726 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:09,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:09,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1622768455, now seen corresponding path program 109 times [2021-04-15 02:30:09,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:09,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227703658] [2021-04-15 02:30:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:09,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227703658] [2021-04-15 02:30:09,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558444238] [2021-04-15 02:30:09,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:09,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:09,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:10,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:10,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:10,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:10,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:10,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:10,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:10,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:10,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:10,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548278975] [2021-04-15 02:30:10,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:10,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:10,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:10,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:10,216 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:10,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:10,538 INFO L93 Difference]: Finished difference Result 479 states and 1440 transitions. [2021-04-15 02:30:10,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:30:10,538 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:10,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:10,539 INFO L225 Difference]: With dead ends: 479 [2021-04-15 02:30:10,539 INFO L226 Difference]: Without dead ends: 463 [2021-04-15 02:30:10,539 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 274.4ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:10,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-04-15 02:30:10,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 423. [2021-04-15 02:30:10,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.146919431279621) internal successors, (1328), 422 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:10,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1328 transitions. [2021-04-15 02:30:10,545 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1328 transitions. Word has length 18 [2021-04-15 02:30:10,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:10,545 INFO L480 AbstractCegarLoop]: Abstraction has 423 states and 1328 transitions. [2021-04-15 02:30:10,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:10,545 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1328 transitions. [2021-04-15 02:30:10,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:10,546 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:10,546 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:10,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1443 [2021-04-15 02:30:10,753 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:10,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:10,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1928615481, now seen corresponding path program 110 times [2021-04-15 02:30:10,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:10,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812024952] [2021-04-15 02:30:10,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:10,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:10,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812024952] [2021-04-15 02:30:10,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482225502] [2021-04-15 02:30:10,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:10,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:10,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:10,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:10,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:11,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:11,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:11,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:11,446 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:11,446 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:11,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:11,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:11,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:11,651 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:11,666 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:11,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:11,666 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:11,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:11,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:11,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209482458] [2021-04-15 02:30:11,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:11,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:11,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:11,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:11,696 INFO L87 Difference]: Start difference. First operand 423 states and 1328 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:12,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:12,089 INFO L93 Difference]: Finished difference Result 513 states and 1501 transitions. [2021-04-15 02:30:12,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:30:12,090 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:12,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:12,091 INFO L225 Difference]: With dead ends: 513 [2021-04-15 02:30:12,091 INFO L226 Difference]: Without dead ends: 494 [2021-04-15 02:30:12,091 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 334.0ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:30:12,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-04-15 02:30:12,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 422. [2021-04-15 02:30:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.125890736342043) internal successors, (1316), 421 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:12,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1316 transitions. [2021-04-15 02:30:12,097 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1316 transitions. Word has length 18 [2021-04-15 02:30:12,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:12,098 INFO L480 AbstractCegarLoop]: Abstraction has 422 states and 1316 transitions. [2021-04-15 02:30:12,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:12,098 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1316 transitions. [2021-04-15 02:30:12,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:12,098 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:12,099 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:12,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1509 [2021-04-15 02:30:12,320 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:12,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:12,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1077471349, now seen corresponding path program 111 times [2021-04-15 02:30:12,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:12,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529438468] [2021-04-15 02:30:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:12,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529438468] [2021-04-15 02:30:12,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443248148] [2021-04-15 02:30:12,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:30:12,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:30:12,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:12,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:12,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:12,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:12,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:12,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:13,121 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:13,121 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:13,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:13,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:13,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:13,338 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:13,356 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:13,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:13,357 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:13,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:13,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:13,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858865133] [2021-04-15 02:30:13,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:13,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:13,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:13,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:13,389 INFO L87 Difference]: Start difference. First operand 422 states and 1316 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:13,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:13,853 INFO L93 Difference]: Finished difference Result 479 states and 1433 transitions. [2021-04-15 02:30:13,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:30:13,853 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:13,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:13,854 INFO L225 Difference]: With dead ends: 479 [2021-04-15 02:30:13,854 INFO L226 Difference]: Without dead ends: 469 [2021-04-15 02:30:13,854 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 449.9ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:30:13,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-04-15 02:30:13,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 424. [2021-04-15 02:30:13,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.1252955082742315) internal successors, (1322), 423 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:13,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1322 transitions. [2021-04-15 02:30:13,859 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1322 transitions. Word has length 18 [2021-04-15 02:30:13,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:13,859 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 1322 transitions. [2021-04-15 02:30:13,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1322 transitions. [2021-04-15 02:30:13,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:13,859 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:13,859 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:14,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1658,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:14,060 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:14,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:14,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1654277767, now seen corresponding path program 112 times [2021-04-15 02:30:14,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:14,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393149956] [2021-04-15 02:30:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:14,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393149956] [2021-04-15 02:30:14,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410730830] [2021-04-15 02:30:14,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:14,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:14,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:14,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:14,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:14,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:14,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:14,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:14,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:14,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:14,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:14,552 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:14,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:14,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:14,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747607155] [2021-04-15 02:30:14,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:14,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:14,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:14,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:14,553 INFO L87 Difference]: Start difference. First operand 424 states and 1322 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:14,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:14,896 INFO L93 Difference]: Finished difference Result 515 states and 1560 transitions. [2021-04-15 02:30:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:30:14,896 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:14,897 INFO L225 Difference]: With dead ends: 515 [2021-04-15 02:30:14,897 INFO L226 Difference]: Without dead ends: 499 [2021-04-15 02:30:14,897 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:14,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-04-15 02:30:14,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 458. [2021-04-15 02:30:14,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1531728665207877) internal successors, (1441), 457 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1441 transitions. [2021-04-15 02:30:14,902 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1441 transitions. Word has length 18 [2021-04-15 02:30:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:14,902 INFO L480 AbstractCegarLoop]: Abstraction has 458 states and 1441 transitions. [2021-04-15 02:30:14,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:14,902 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1441 transitions. [2021-04-15 02:30:14,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:14,903 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:14,903 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:15,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1794,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:15,105 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:15,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:15,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1897106169, now seen corresponding path program 113 times [2021-04-15 02:30:15,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:15,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569738747] [2021-04-15 02:30:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:15,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569738747] [2021-04-15 02:30:15,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828740880] [2021-04-15 02:30:15,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:15,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:30:15,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:15,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:15,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:15,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:15,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:15,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:15,790 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:15,791 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:15,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:15,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:15,903 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:15,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:15,919 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:15,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:15,920 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:15,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:15,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:15,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069981700] [2021-04-15 02:30:15,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:15,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:15,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:15,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:15,949 INFO L87 Difference]: Start difference. First operand 458 states and 1441 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:16,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:16,569 INFO L93 Difference]: Finished difference Result 583 states and 1699 transitions. [2021-04-15 02:30:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:30:16,570 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:16,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:16,571 INFO L225 Difference]: With dead ends: 583 [2021-04-15 02:30:16,571 INFO L226 Difference]: Without dead ends: 557 [2021-04-15 02:30:16,571 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 424.8ms TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:30:16,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-04-15 02:30:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 462. [2021-04-15 02:30:16,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1496746203904555) internal successors, (1452), 461 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:16,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1452 transitions. [2021-04-15 02:30:16,579 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1452 transitions. Word has length 18 [2021-04-15 02:30:16,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:16,579 INFO L480 AbstractCegarLoop]: Abstraction has 462 states and 1452 transitions. [2021-04-15 02:30:16,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:16,579 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1452 transitions. [2021-04-15 02:30:16,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:16,580 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:16,580 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:16,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1863 [2021-04-15 02:30:16,801 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:16,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1045962037, now seen corresponding path program 114 times [2021-04-15 02:30:16,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:16,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945485621] [2021-04-15 02:30:16,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:16,889 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:16,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945485621] [2021-04-15 02:30:16,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122808948] [2021-04-15 02:30:16,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:16,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:30:16,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:16,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:16,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:17,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:17,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:17,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:17,413 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:17,413 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:17,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:17,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:17,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:17,515 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:17,531 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:17,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:17,532 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:17,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:17,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:17,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931237422] [2021-04-15 02:30:17,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:17,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:17,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:17,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:17,560 INFO L87 Difference]: Start difference. First operand 462 states and 1452 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:18,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:18,034 INFO L93 Difference]: Finished difference Result 516 states and 1564 transitions. [2021-04-15 02:30:18,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:30:18,034 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:18,035 INFO L225 Difference]: With dead ends: 516 [2021-04-15 02:30:18,035 INFO L226 Difference]: Without dead ends: 506 [2021-04-15 02:30:18,035 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 381.9ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:30:18,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-04-15 02:30:18,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 464. [2021-04-15 02:30:18,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.14902807775378) internal successors, (1458), 463 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:18,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1458 transitions. [2021-04-15 02:30:18,040 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1458 transitions. Word has length 18 [2021-04-15 02:30:18,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:18,040 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 1458 transitions. [2021-04-15 02:30:18,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:18,040 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1458 transitions. [2021-04-15 02:30:18,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:18,041 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:18,041 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:18,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2014,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:18,242 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:18,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:18,242 INFO L82 PathProgramCache]: Analyzing trace with hash -430297721, now seen corresponding path program 115 times [2021-04-15 02:30:18,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:18,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69978225] [2021-04-15 02:30:18,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:18,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69978225] [2021-04-15 02:30:18,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089722365] [2021-04-15 02:30:18,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:18,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:18,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:18,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:18,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:18,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:18,867 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:18,867 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:18,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:18,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:18,933 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:18,934 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:18,949 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:18,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:18,949 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:18,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:18,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:18,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68340130] [2021-04-15 02:30:18,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:18,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:18,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:18,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:18,977 INFO L87 Difference]: Start difference. First operand 464 states and 1458 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:19,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:19,413 INFO L93 Difference]: Finished difference Result 532 states and 1598 transitions. [2021-04-15 02:30:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:30:19,413 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:19,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:19,414 INFO L225 Difference]: With dead ends: 532 [2021-04-15 02:30:19,414 INFO L226 Difference]: Without dead ends: 522 [2021-04-15 02:30:19,414 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 399.2ms TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:30:19,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-04-15 02:30:19,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 464. [2021-04-15 02:30:19,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.14902807775378) internal successors, (1458), 463 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:19,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1458 transitions. [2021-04-15 02:30:19,419 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1458 transitions. Word has length 18 [2021-04-15 02:30:19,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:19,419 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 1458 transitions. [2021-04-15 02:30:19,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:19,419 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1458 transitions. [2021-04-15 02:30:19,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:19,420 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:19,420 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:19,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2109 [2021-04-15 02:30:19,621 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:19,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:19,622 INFO L82 PathProgramCache]: Analyzing trace with hash -486883791, now seen corresponding path program 116 times [2021-04-15 02:30:19,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:19,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160946172] [2021-04-15 02:30:19,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:30:19,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160946172] [2021-04-15 02:30:19,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594405655] [2021-04-15 02:30:19,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:19,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:19,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:19,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:19,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:19,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:19,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:20,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:20,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:20,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:20,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:20,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:20,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-04-15 02:30:20,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724883288] [2021-04-15 02:30:20,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 02:30:20,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:20,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 02:30:20,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:30:20,095 INFO L87 Difference]: Start difference. First operand 464 states and 1458 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:20,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:20,267 INFO L93 Difference]: Finished difference Result 485 states and 1487 transitions. [2021-04-15 02:30:20,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:30:20,267 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:20,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:20,268 INFO L225 Difference]: With dead ends: 485 [2021-04-15 02:30:20,268 INFO L226 Difference]: Without dead ends: 467 [2021-04-15 02:30:20,268 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 258.0ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:20,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-04-15 02:30:20,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 464. [2021-04-15 02:30:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.146868250539957) internal successors, (1457), 463 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1457 transitions. [2021-04-15 02:30:20,274 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1457 transitions. Word has length 18 [2021-04-15 02:30:20,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:20,275 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 1457 transitions. [2021-04-15 02:30:20,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:20,275 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1457 transitions. [2021-04-15 02:30:20,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:20,276 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:20,276 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:20,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2225 [2021-04-15 02:30:20,476 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:20,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:20,477 INFO L82 PathProgramCache]: Analyzing trace with hash -100682677, now seen corresponding path program 117 times [2021-04-15 02:30:20,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:20,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545723509] [2021-04-15 02:30:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:20,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545723509] [2021-04-15 02:30:20,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856806356] [2021-04-15 02:30:20,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:30:20,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:30:20,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:20,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:20,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:20,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:20,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:20,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:21,135 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:21,135 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:21,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:21,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:21,392 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:21,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:21,410 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:21,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:21,411 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:21,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:21,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-04-15 02:30:21,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632425850] [2021-04-15 02:30:21,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 02:30:21,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:21,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 02:30:21,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:30:21,441 INFO L87 Difference]: Start difference. First operand 464 states and 1457 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:21,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:21,826 INFO L93 Difference]: Finished difference Result 544 states and 1603 transitions. [2021-04-15 02:30:21,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:30:21,827 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:21,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:21,828 INFO L225 Difference]: With dead ends: 544 [2021-04-15 02:30:21,828 INFO L226 Difference]: Without dead ends: 534 [2021-04-15 02:30:21,828 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 384.3ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:30:21,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-04-15 02:30:21,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 464. [2021-04-15 02:30:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.146868250539957) internal successors, (1457), 463 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1457 transitions. [2021-04-15 02:30:21,835 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1457 transitions. Word has length 18 [2021-04-15 02:30:21,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:21,836 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 1457 transitions. [2021-04-15 02:30:21,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1457 transitions. [2021-04-15 02:30:21,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:21,836 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:21,836 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:22,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2309 [2021-04-15 02:30:22,058 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:22,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:22,058 INFO L82 PathProgramCache]: Analyzing trace with hash 437172901, now seen corresponding path program 118 times [2021-04-15 02:30:22,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:22,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689554466] [2021-04-15 02:30:22,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:22,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689554466] [2021-04-15 02:30:22,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560201873] [2021-04-15 02:30:22,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:22,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:22,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:22,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:22,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:22,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:22,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:22,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:22,717 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:22,717 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:22,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:22,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:22,833 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:22,834 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:22,851 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:22,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:22,852 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:22,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:22,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:22,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568544329] [2021-04-15 02:30:22,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:22,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:22,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:22,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:22,884 INFO L87 Difference]: Start difference. First operand 464 states and 1457 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:23,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:23,543 INFO L93 Difference]: Finished difference Result 595 states and 1709 transitions. [2021-04-15 02:30:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:30:23,544 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:23,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:23,545 INFO L225 Difference]: With dead ends: 595 [2021-04-15 02:30:23,545 INFO L226 Difference]: Without dead ends: 566 [2021-04-15 02:30:23,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 493.8ms TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:30:23,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-04-15 02:30:23,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 455. [2021-04-15 02:30:23,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.13215859030837) internal successors, (1422), 454 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1422 transitions. [2021-04-15 02:30:23,553 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1422 transitions. Word has length 18 [2021-04-15 02:30:23,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:23,553 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 1422 transitions. [2021-04-15 02:30:23,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:23,553 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1422 transitions. [2021-04-15 02:30:23,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:23,553 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:23,553 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:23,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2472,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:23,765 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:23,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:23,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1052837217, now seen corresponding path program 119 times [2021-04-15 02:30:23,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:23,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878792819] [2021-04-15 02:30:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:23,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878792819] [2021-04-15 02:30:23,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482865233] [2021-04-15 02:30:23,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:23,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:30:23,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:23,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:23,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:24,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:24,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:24,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:24,360 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:24,360 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:24,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:24,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:24,459 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:24,460 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:24,475 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:24,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:24,476 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:24,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:24,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:24,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109831126] [2021-04-15 02:30:24,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:24,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:24,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:24,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:24,503 INFO L87 Difference]: Start difference. First operand 455 states and 1422 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:24,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:24,926 INFO L93 Difference]: Finished difference Result 523 states and 1566 transitions. [2021-04-15 02:30:24,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:30:24,926 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:24,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:24,927 INFO L225 Difference]: With dead ends: 523 [2021-04-15 02:30:24,927 INFO L226 Difference]: Without dead ends: 513 [2021-04-15 02:30:24,928 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 392.6ms TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:30:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-04-15 02:30:24,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 456. [2021-04-15 02:30:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.131868131868132) internal successors, (1425), 455 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1425 transitions. [2021-04-15 02:30:24,932 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1425 transitions. Word has length 18 [2021-04-15 02:30:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:24,932 INFO L480 AbstractCegarLoop]: Abstraction has 456 states and 1425 transitions. [2021-04-15 02:30:24,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1425 transitions. [2021-04-15 02:30:24,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:24,933 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:24,933 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:25,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2574 [2021-04-15 02:30:25,133 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:25,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:25,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1663900857, now seen corresponding path program 120 times [2021-04-15 02:30:25,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:25,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618757281] [2021-04-15 02:30:25,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:25,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618757281] [2021-04-15 02:30:25,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765589395] [2021-04-15 02:30:25,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:25,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:30:25,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:25,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:25,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:25,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:25,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:25,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:25,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:25,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:25,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:25,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:25,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:25,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402591328] [2021-04-15 02:30:25,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:25,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:25,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:25,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:25,617 INFO L87 Difference]: Start difference. First operand 456 states and 1425 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:25,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:25,965 INFO L93 Difference]: Finished difference Result 558 states and 1698 transitions. [2021-04-15 02:30:25,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:30:25,965 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:25,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:25,966 INFO L225 Difference]: With dead ends: 558 [2021-04-15 02:30:25,966 INFO L226 Difference]: Without dead ends: 540 [2021-04-15 02:30:25,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 284.6ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:25,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-04-15 02:30:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 500. [2021-04-15 02:30:25,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.158316633266533) internal successors, (1576), 499 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1576 transitions. [2021-04-15 02:30:25,972 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1576 transitions. Word has length 18 [2021-04-15 02:30:25,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:25,972 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 1576 transitions. [2021-04-15 02:30:25,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:25,972 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1576 transitions. [2021-04-15 02:30:25,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:25,972 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:25,972 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:26,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2682,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:26,173 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:26,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:26,173 INFO L82 PathProgramCache]: Analyzing trace with hash -920317497, now seen corresponding path program 121 times [2021-04-15 02:30:26,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:26,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449233822] [2021-04-15 02:30:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:26,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449233822] [2021-04-15 02:30:26,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319495223] [2021-04-15 02:30:26,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:26,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:26,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:26,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:26,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:26,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:26,764 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:26,764 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:26,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:26,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:26,882 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:26,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:26,898 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:26,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:26,899 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:26,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:26,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:26,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668585813] [2021-04-15 02:30:26,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:26,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:26,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:26,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:26,928 INFO L87 Difference]: Start difference. First operand 500 states and 1576 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:27,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:27,631 INFO L93 Difference]: Finished difference Result 647 states and 1895 transitions. [2021-04-15 02:30:27,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:30:27,631 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:27,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:27,633 INFO L225 Difference]: With dead ends: 647 [2021-04-15 02:30:27,633 INFO L226 Difference]: Without dead ends: 621 [2021-04-15 02:30:27,633 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 471.4ms TimeCoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:30:27,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-04-15 02:30:27,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 506. [2021-04-15 02:30:27,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.1623762376237625) internal successors, (1597), 505 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1597 transitions. [2021-04-15 02:30:27,641 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1597 transitions. Word has length 18 [2021-04-15 02:30:27,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:27,641 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1597 transitions. [2021-04-15 02:30:27,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:27,642 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1597 transitions. [2021-04-15 02:30:27,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:27,642 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:27,642 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:27,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2727,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:27,857 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:27,857 INFO L82 PathProgramCache]: Analyzing trace with hash -69173365, now seen corresponding path program 122 times [2021-04-15 02:30:27,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:27,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938762105] [2021-04-15 02:30:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:27,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938762105] [2021-04-15 02:30:27,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257616603] [2021-04-15 02:30:27,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:27,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:27,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:27,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:27,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:28,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:28,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:28,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:28,459 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:28,459 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:28,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:28,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:28,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:28,566 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:28,581 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:28,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:28,582 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:28,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:28,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:30:28,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883372402] [2021-04-15 02:30:28,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:28,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:28,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:28,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:28,611 INFO L87 Difference]: Start difference. First operand 506 states and 1597 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:29,386 INFO L93 Difference]: Finished difference Result 727 states and 2070 transitions. [2021-04-15 02:30:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:30:29,386 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:29,387 INFO L225 Difference]: With dead ends: 727 [2021-04-15 02:30:29,387 INFO L226 Difference]: Without dead ends: 685 [2021-04-15 02:30:29,387 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 591.3ms TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:30:29,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-04-15 02:30:29,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 507. [2021-04-15 02:30:29,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:29,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-04-15 02:30:29,393 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-04-15 02:30:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:29,393 INFO L480 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-04-15 02:30:29,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:29,393 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-04-15 02:30:29,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:29,394 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:29,394 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:29,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2845,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:29,594 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:29,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:29,595 INFO L82 PathProgramCache]: Analyzing trace with hash 546490951, now seen corresponding path program 123 times [2021-04-15 02:30:29,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:29,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657298910] [2021-04-15 02:30:29,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:29,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657298910] [2021-04-15 02:30:29,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559559048] [2021-04-15 02:30:29,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:29,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:30:29,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:29,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:29,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:30,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:30,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:30,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:30,300 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:30,300 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:30,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:30,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:30,361 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:30,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:30,377 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:30,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:30,378 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:30,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:30,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:30:30,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974033825] [2021-04-15 02:30:30,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:30,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:30,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:30,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:30,407 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:30,875 INFO L93 Difference]: Finished difference Result 598 states and 1790 transitions. [2021-04-15 02:30:30,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:30:30,876 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:30,876 INFO L225 Difference]: With dead ends: 598 [2021-04-15 02:30:30,876 INFO L226 Difference]: Without dead ends: 588 [2021-04-15 02:30:30,877 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 510.2ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:30:30,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-04-15 02:30:30,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 507. [2021-04-15 02:30:30,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:30,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-04-15 02:30:30,882 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-04-15 02:30:30,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:30,882 INFO L480 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-04-15 02:30:30,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:30,882 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-04-15 02:30:30,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:30,882 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:30,883 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:31,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2944,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:31,083 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:31,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:31,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1842751733, now seen corresponding path program 124 times [2021-04-15 02:30:31,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:31,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113183075] [2021-04-15 02:30:31,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:31,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113183075] [2021-04-15 02:30:31,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515261253] [2021-04-15 02:30:31,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:31,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:31,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:31,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:31,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:31,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:31,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:31,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:31,772 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:31,772 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:31,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:31,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:31,885 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:31,886 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:31,901 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:31,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:31,902 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:31,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:31,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:30:31,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104073287] [2021-04-15 02:30:31,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:31,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:31,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:31,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:31,931 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:32,409 INFO L93 Difference]: Finished difference Result 608 states and 1810 transitions. [2021-04-15 02:30:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:30:32,409 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:32,410 INFO L225 Difference]: With dead ends: 608 [2021-04-15 02:30:32,410 INFO L226 Difference]: Without dead ends: 598 [2021-04-15 02:30:32,410 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 498.2ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:30:32,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-04-15 02:30:32,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 507. [2021-04-15 02:30:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-04-15 02:30:32,416 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-04-15 02:30:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:32,416 INFO L480 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-04-15 02:30:32,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-04-15 02:30:32,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:32,417 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:32,417 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:32,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3033 [2021-04-15 02:30:32,633 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:32,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:32,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1754340969, now seen corresponding path program 125 times [2021-04-15 02:30:32,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:32,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410218527] [2021-04-15 02:30:32,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:32,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410218527] [2021-04-15 02:30:32,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239493732] [2021-04-15 02:30:32,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:32,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:30:32,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:32,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:32,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:33,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:33,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:33,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:33,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:33,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:33,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:33,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:33,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-04-15 02:30:33,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790132603] [2021-04-15 02:30:33,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 02:30:33,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:33,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 02:30:33,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:30:33,177 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:33,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:33,457 INFO L93 Difference]: Finished difference Result 537 states and 1638 transitions. [2021-04-15 02:30:33,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:30:33,457 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:33,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:33,458 INFO L225 Difference]: With dead ends: 537 [2021-04-15 02:30:33,458 INFO L226 Difference]: Without dead ends: 519 [2021-04-15 02:30:33,458 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 299.6ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:30:33,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-04-15 02:30:33,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 507. [2021-04-15 02:30:33,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.142292490118577) internal successors, (1590), 506 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1590 transitions. [2021-04-15 02:30:33,463 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1590 transitions. Word has length 18 [2021-04-15 02:30:33,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:33,463 INFO L480 AbstractCegarLoop]: Abstraction has 507 states and 1590 transitions. [2021-04-15 02:30:33,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:33,463 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1590 transitions. [2021-04-15 02:30:33,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:33,464 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:33,464 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:33,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3183 [2021-04-15 02:30:33,676 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:33,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:33,676 INFO L82 PathProgramCache]: Analyzing trace with hash -214619961, now seen corresponding path program 126 times [2021-04-15 02:30:33,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:33,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991314786] [2021-04-15 02:30:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:33,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991314786] [2021-04-15 02:30:33,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878223041] [2021-04-15 02:30:33,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:33,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:30:33,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:33,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:33,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:34,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:34,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:34,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:34,311 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:34,312 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:34,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:34,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:34,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:34,469 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:34,485 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:34,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:34,486 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:34,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:34,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:34,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211056746] [2021-04-15 02:30:34,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:34,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:34,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:34,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:34,513 INFO L87 Difference]: Start difference. First operand 507 states and 1590 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:35,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:35,049 INFO L93 Difference]: Finished difference Result 618 states and 1823 transitions. [2021-04-15 02:30:35,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:30:35,049 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:35,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:35,050 INFO L225 Difference]: With dead ends: 618 [2021-04-15 02:30:35,050 INFO L226 Difference]: Without dead ends: 608 [2021-04-15 02:30:35,050 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 485.8ms TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:30:35,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-04-15 02:30:35,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 507. [2021-04-15 02:30:35,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.142292490118577) internal successors, (1590), 506 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:35,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1590 transitions. [2021-04-15 02:30:35,057 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1590 transitions. Word has length 18 [2021-04-15 02:30:35,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:35,057 INFO L480 AbstractCegarLoop]: Abstraction has 507 states and 1590 transitions. [2021-04-15 02:30:35,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:35,057 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1590 transitions. [2021-04-15 02:30:35,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:35,058 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:35,058 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:35,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3282,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:35,278 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:35,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:35,278 INFO L82 PathProgramCache]: Analyzing trace with hash -720966227, now seen corresponding path program 127 times [2021-04-15 02:30:35,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:35,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514308772] [2021-04-15 02:30:35,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:35,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514308772] [2021-04-15 02:30:35,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485608636] [2021-04-15 02:30:35,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:35,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:35,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:35,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:35,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:35,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:35,939 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:35,939 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:35,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:36,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:36,091 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:36,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:36,107 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:36,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:36,108 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:36,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:36,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:30:36,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037920534] [2021-04-15 02:30:36,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:36,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:36,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:36,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:36,136 INFO L87 Difference]: Start difference. First operand 507 states and 1590 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:36,842 INFO L93 Difference]: Finished difference Result 681 states and 1975 transitions. [2021-04-15 02:30:36,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:30:36,842 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:36,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:36,843 INFO L225 Difference]: With dead ends: 681 [2021-04-15 02:30:36,843 INFO L226 Difference]: Without dead ends: 652 [2021-04-15 02:30:36,843 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 607.8ms TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:30:36,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-04-15 02:30:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 497. [2021-04-15 02:30:36,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1330645161290325) internal successors, (1554), 496 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1554 transitions. [2021-04-15 02:30:36,848 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1554 transitions. Word has length 18 [2021-04-15 02:30:36,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:36,849 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1554 transitions. [2021-04-15 02:30:36,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1554 transitions. [2021-04-15 02:30:36,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:36,849 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:36,849 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:37,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3427 [2021-04-15 02:30:37,050 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:37,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:37,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1184758385, now seen corresponding path program 128 times [2021-04-15 02:30:37,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:37,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983673399] [2021-04-15 02:30:37,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:37,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983673399] [2021-04-15 02:30:37,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467767553] [2021-04-15 02:30:37,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:37,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:37,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:37,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:37,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:37,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:37,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:37,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:37,746 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:37,746 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:37,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:37,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:37,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:37,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:37,845 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:37,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:37,846 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:37,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:37,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:30:37,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749700102] [2021-04-15 02:30:37,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:37,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:37,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:37,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:37,875 INFO L87 Difference]: Start difference. First operand 497 states and 1554 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:38,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:38,384 INFO L93 Difference]: Finished difference Result 595 states and 1767 transitions. [2021-04-15 02:30:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:30:38,384 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:38,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:38,385 INFO L225 Difference]: With dead ends: 595 [2021-04-15 02:30:38,385 INFO L226 Difference]: Without dead ends: 585 [2021-04-15 02:30:38,385 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 532.6ms TimeCoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:30:38,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-04-15 02:30:38,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 498. [2021-04-15 02:30:38,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.132796780684105) internal successors, (1557), 497 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:38,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1557 transitions. [2021-04-15 02:30:38,390 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1557 transitions. Word has length 18 [2021-04-15 02:30:38,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:38,390 INFO L480 AbstractCegarLoop]: Abstraction has 498 states and 1557 transitions. [2021-04-15 02:30:38,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:38,390 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1557 transitions. [2021-04-15 02:30:38,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:38,390 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:38,391 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:38,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3543,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:38,591 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:38,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:38,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1448223097, now seen corresponding path program 129 times [2021-04-15 02:30:38,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:38,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120234424] [2021-04-15 02:30:38,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:38,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120234424] [2021-04-15 02:30:38,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988485026] [2021-04-15 02:30:38,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:38,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:30:38,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:38,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:38,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:38,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:38,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:39,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:39,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:39,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:39,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:39,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:39,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:39,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940967024] [2021-04-15 02:30:39,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:39,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:39,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:39,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:39,046 INFO L87 Difference]: Start difference. First operand 498 states and 1557 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:39,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:39,365 INFO L93 Difference]: Finished difference Result 613 states and 1879 transitions. [2021-04-15 02:30:39,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:30:39,366 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:39,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:39,366 INFO L225 Difference]: With dead ends: 613 [2021-04-15 02:30:39,366 INFO L226 Difference]: Without dead ends: 597 [2021-04-15 02:30:39,367 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 280.2ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:39,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-04-15 02:30:39,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 570. [2021-04-15 02:30:39,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 3.154657293497364) internal successors, (1795), 569 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:39,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1795 transitions. [2021-04-15 02:30:39,372 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1795 transitions. Word has length 18 [2021-04-15 02:30:39,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:39,372 INFO L480 AbstractCegarLoop]: Abstraction has 570 states and 1795 transitions. [2021-04-15 02:30:39,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:39,372 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1795 transitions. [2021-04-15 02:30:39,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:39,373 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:39,373 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:39,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3685,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:39,573 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:39,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:39,574 INFO L82 PathProgramCache]: Analyzing trace with hash -704639737, now seen corresponding path program 130 times [2021-04-15 02:30:39,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:39,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965644301] [2021-04-15 02:30:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:39,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965644301] [2021-04-15 02:30:39,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632285272] [2021-04-15 02:30:39,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:39,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:39,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:39,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:39,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:39,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:39,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:40,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:40,193 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:40,193 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:40,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:40,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:40,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:40,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:40,301 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:40,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:40,302 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:40,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:40,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:40,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307296384] [2021-04-15 02:30:40,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:40,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:40,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:40,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:40,336 INFO L87 Difference]: Start difference. First operand 570 states and 1795 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:41,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:41,208 INFO L93 Difference]: Finished difference Result 700 states and 2080 transitions. [2021-04-15 02:30:41,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 02:30:41,208 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:41,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:41,209 INFO L225 Difference]: With dead ends: 700 [2021-04-15 02:30:41,209 INFO L226 Difference]: Without dead ends: 676 [2021-04-15 02:30:41,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 585.2ms TimeCoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:30:41,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-04-15 02:30:41,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 573. [2021-04-15 02:30:41,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 3.1573426573426575) internal successors, (1806), 572 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:41,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1806 transitions. [2021-04-15 02:30:41,216 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1806 transitions. Word has length 18 [2021-04-15 02:30:41,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:41,216 INFO L480 AbstractCegarLoop]: Abstraction has 573 states and 1806 transitions. [2021-04-15 02:30:41,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:41,216 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1806 transitions. [2021-04-15 02:30:41,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:41,217 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:41,217 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:41,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3739 [2021-04-15 02:30:41,417 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:41,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:41,418 INFO L82 PathProgramCache]: Analyzing trace with hash 146504395, now seen corresponding path program 131 times [2021-04-15 02:30:41,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:41,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53202597] [2021-04-15 02:30:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:41,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53202597] [2021-04-15 02:30:41,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030507375] [2021-04-15 02:30:41,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:41,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:30:41,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:41,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:41,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:41,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:41,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:41,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:42,100 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:42,100 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:42,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:42,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:42,216 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:42,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:42,233 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:42,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:42,233 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:42,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:42,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:42,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793991997] [2021-04-15 02:30:42,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:42,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:42,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:42,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:42,262 INFO L87 Difference]: Start difference. First operand 573 states and 1806 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:42,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:42,845 INFO L93 Difference]: Finished difference Result 692 states and 2071 transitions. [2021-04-15 02:30:42,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:30:42,846 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:42,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:42,847 INFO L225 Difference]: With dead ends: 692 [2021-04-15 02:30:42,847 INFO L226 Difference]: Without dead ends: 682 [2021-04-15 02:30:42,847 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 497.8ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:30:42,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-04-15 02:30:42,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 591. [2021-04-15 02:30:42,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1627118644067798) internal successors, (1866), 590 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:42,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1866 transitions. [2021-04-15 02:30:42,857 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1866 transitions. Word has length 18 [2021-04-15 02:30:42,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:42,857 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 1866 transitions. [2021-04-15 02:30:42,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:42,857 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1866 transitions. [2021-04-15 02:30:42,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:42,858 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:42,858 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:43,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3840,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:43,073 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:43,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:43,073 INFO L82 PathProgramCache]: Analyzing trace with hash 762168711, now seen corresponding path program 132 times [2021-04-15 02:30:43,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:43,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318099170] [2021-04-15 02:30:43,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:43,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318099170] [2021-04-15 02:30:43,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183270932] [2021-04-15 02:30:43,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:43,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:30:43,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:43,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:43,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:43,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:43,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:43,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:43,868 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:43,869 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:43,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:43,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:43,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:43,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:43,989 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:43,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:43,990 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:44,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:44,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:30:44,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732961930] [2021-04-15 02:30:44,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:44,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:44,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:44,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:44,025 INFO L87 Difference]: Start difference. First operand 591 states and 1866 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:44,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:44,738 INFO L93 Difference]: Finished difference Result 752 states and 2200 transitions. [2021-04-15 02:30:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:30:44,739 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:44,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:44,740 INFO L225 Difference]: With dead ends: 752 [2021-04-15 02:30:44,740 INFO L226 Difference]: Without dead ends: 730 [2021-04-15 02:30:44,740 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 676.5ms TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 02:30:44,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-04-15 02:30:44,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 593. [2021-04-15 02:30:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-04-15 02:30:44,747 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-04-15 02:30:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:44,747 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-04-15 02:30:44,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-04-15 02:30:44,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:44,747 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:44,747 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:44,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3950,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:44,948 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:44,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:44,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1627073973, now seen corresponding path program 133 times [2021-04-15 02:30:44,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:44,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571803355] [2021-04-15 02:30:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:45,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571803355] [2021-04-15 02:30:45,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588192446] [2021-04-15 02:30:45,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:45,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:45,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:45,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:45,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:45,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:45,563 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:45,564 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:45,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:45,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:45,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:45,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:45,790 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:45,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:45,790 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:45,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:45,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:30:45,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791079518] [2021-04-15 02:30:45,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:45,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:45,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:45,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:45,819 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:46,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:46,390 INFO L93 Difference]: Finished difference Result 683 states and 2069 transitions. [2021-04-15 02:30:46,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:30:46,390 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:46,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:46,391 INFO L225 Difference]: With dead ends: 683 [2021-04-15 02:30:46,391 INFO L226 Difference]: Without dead ends: 678 [2021-04-15 02:30:46,391 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 561.7ms TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:30:46,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-04-15 02:30:46,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 593. [2021-04-15 02:30:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:46,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-04-15 02:30:46,397 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-04-15 02:30:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:46,397 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-04-15 02:30:46,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-04-15 02:30:46,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:46,398 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:46,398 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:46,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-04-15 02:30:46,613 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:46,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:46,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1615814151, now seen corresponding path program 134 times [2021-04-15 02:30:46,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:46,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118025761] [2021-04-15 02:30:46,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:46,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118025761] [2021-04-15 02:30:46,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650619581] [2021-04-15 02:30:46,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:46,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:46,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:46,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:46,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:47,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:47,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:47,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:47,227 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:47,227 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:47,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:47,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:47,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:47,446 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:47,462 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:47,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:47,462 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:47,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:47,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:30:47,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875062544] [2021-04-15 02:30:47,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:47,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:47,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:47,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:47,492 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:47,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:47,991 INFO L93 Difference]: Finished difference Result 681 states and 2066 transitions. [2021-04-15 02:30:47,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:30:47,992 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:47,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:47,992 INFO L225 Difference]: With dead ends: 681 [2021-04-15 02:30:47,992 INFO L226 Difference]: Without dead ends: 676 [2021-04-15 02:30:47,993 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 540.2ms TimeCoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:30:47,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-04-15 02:30:47,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 593. [2021-04-15 02:30:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:47,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-04-15 02:30:47,998 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-04-15 02:30:47,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:47,999 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-04-15 02:30:47,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:47,999 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-04-15 02:30:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:47,999 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:47,999 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:48,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4225,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:48,200 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:48,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:48,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1904159473, now seen corresponding path program 135 times [2021-04-15 02:30:48,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:48,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053392696] [2021-04-15 02:30:48,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:48,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053392696] [2021-04-15 02:30:48,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435761524] [2021-04-15 02:30:48,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:48,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:30:48,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:48,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:48,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:48,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:48,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:48,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:48,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:48,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:48,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:48,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:48,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:48,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548799724] [2021-04-15 02:30:48,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:48,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:48,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:48,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:48,635 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:48,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:48,986 INFO L93 Difference]: Finished difference Result 630 states and 1927 transitions. [2021-04-15 02:30:48,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:30:48,987 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:48,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:48,987 INFO L225 Difference]: With dead ends: 630 [2021-04-15 02:30:48,988 INFO L226 Difference]: Without dead ends: 612 [2021-04-15 02:30:48,988 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 313.7ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:30:48,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-04-15 02:30:48,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 593. [2021-04-15 02:30:48,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.152027027027027) internal successors, (1866), 592 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:48,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1866 transitions. [2021-04-15 02:30:48,993 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1866 transitions. Word has length 18 [2021-04-15 02:30:48,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:48,993 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1866 transitions. [2021-04-15 02:30:48,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:48,993 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1866 transitions. [2021-04-15 02:30:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:48,994 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:48,994 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:49,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4368,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:49,195 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:49,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:49,195 INFO L82 PathProgramCache]: Analyzing trace with hash 548291531, now seen corresponding path program 136 times [2021-04-15 02:30:49,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:49,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024718009] [2021-04-15 02:30:49,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:49,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024718009] [2021-04-15 02:30:49,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291466115] [2021-04-15 02:30:49,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:49,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:49,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:49,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:49,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:49,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:49,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:49,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:49,878 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:49,878 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:49,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:49,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:49,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:49,953 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:49,969 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:49,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:49,969 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:49,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:49,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:30:49,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007039005] [2021-04-15 02:30:49,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:49,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:49,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:49,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:49,998 INFO L87 Difference]: Start difference. First operand 593 states and 1866 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:50,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:50,637 INFO L93 Difference]: Finished difference Result 747 states and 2217 transitions. [2021-04-15 02:30:50,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:30:50,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:50,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:50,638 INFO L225 Difference]: With dead ends: 747 [2021-04-15 02:30:50,638 INFO L226 Difference]: Without dead ends: 737 [2021-04-15 02:30:50,639 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 653.7ms TimeCoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:30:50,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-04-15 02:30:50,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 599. [2021-04-15 02:30:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.1538461538461537) internal successors, (1886), 598 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1886 transitions. [2021-04-15 02:30:50,645 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1886 transitions. Word has length 18 [2021-04-15 02:30:50,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:50,645 INFO L480 AbstractCegarLoop]: Abstraction has 599 states and 1886 transitions. [2021-04-15 02:30:50,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:50,645 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1886 transitions. [2021-04-15 02:30:50,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:50,645 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:50,646 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:50,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4410,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:50,849 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:50,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:50,849 INFO L82 PathProgramCache]: Analyzing trace with hash 2031426469, now seen corresponding path program 137 times [2021-04-15 02:30:50,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:50,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760400239] [2021-04-15 02:30:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:50,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760400239] [2021-04-15 02:30:50,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844492486] [2021-04-15 02:30:50,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:50,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:30:50,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:50,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:50,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:51,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:51,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:51,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:51,538 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:51,539 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:51,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:51,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:51,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:51,766 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:51,782 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:51,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:51,783 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:51,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:51,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:30:51,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679865914] [2021-04-15 02:30:51,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:51,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:51,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:51,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:51,812 INFO L87 Difference]: Start difference. First operand 599 states and 1886 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:52,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:52,588 INFO L93 Difference]: Finished difference Result 777 states and 2279 transitions. [2021-04-15 02:30:52,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:30:52,589 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:52,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:52,590 INFO L225 Difference]: With dead ends: 777 [2021-04-15 02:30:52,590 INFO L226 Difference]: Without dead ends: 748 [2021-04-15 02:30:52,590 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 760.5ms TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 02:30:52,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-04-15 02:30:52,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 597. [2021-04-15 02:30:52,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.1493288590604025) internal successors, (1877), 596 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:52,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1877 transitions. [2021-04-15 02:30:52,596 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1877 transitions. Word has length 18 [2021-04-15 02:30:52,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:52,596 INFO L480 AbstractCegarLoop]: Abstraction has 597 states and 1877 transitions. [2021-04-15 02:30:52,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:52,596 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1877 transitions. [2021-04-15 02:30:52,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:52,597 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:52,597 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:52,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4523,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:52,798 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:52,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:52,798 INFO L82 PathProgramCache]: Analyzing trace with hash 979347297, now seen corresponding path program 138 times [2021-04-15 02:30:52,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:52,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495898882] [2021-04-15 02:30:52,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:52,895 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:52,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495898882] [2021-04-15 02:30:52,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411539296] [2021-04-15 02:30:52,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:52,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:30:52,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:52,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:52,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:53,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:53,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:53,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:53,423 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:53,424 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:53,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:53,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:53,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:53,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:53,558 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:53,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:53,559 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:53,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:53,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:30:53,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448851525] [2021-04-15 02:30:53,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:30:53,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:53,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:30:53,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:53,588 INFO L87 Difference]: Start difference. First operand 597 states and 1877 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:54,185 INFO L93 Difference]: Finished difference Result 676 states and 2054 transitions. [2021-04-15 02:30:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:30:54,185 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:54,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:54,186 INFO L225 Difference]: With dead ends: 676 [2021-04-15 02:30:54,186 INFO L226 Difference]: Without dead ends: 671 [2021-04-15 02:30:54,186 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 595.5ms TimeCoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:30:54,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-04-15 02:30:54,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 597. [2021-04-15 02:30:54,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.1493288590604025) internal successors, (1877), 596 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1877 transitions. [2021-04-15 02:30:54,192 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1877 transitions. Word has length 18 [2021-04-15 02:30:54,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:54,192 INFO L480 AbstractCegarLoop]: Abstraction has 597 states and 1877 transitions. [2021-04-15 02:30:54,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:54,192 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1877 transitions. [2021-04-15 02:30:54,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:54,193 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:54,193 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:54,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4690 [2021-04-15 02:30:54,393 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:54,393 INFO L82 PathProgramCache]: Analyzing trace with hash 942820167, now seen corresponding path program 139 times [2021-04-15 02:30:54,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:54,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674544571] [2021-04-15 02:30:54,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:54,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674544571] [2021-04-15 02:30:54,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098056782] [2021-04-15 02:30:54,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:54,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:54,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:54,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:54,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:54,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:54,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:54,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:54,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:30:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:54,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:54,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:54,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709797579] [2021-04-15 02:30:54,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:54,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:54,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:54,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:54,855 INFO L87 Difference]: Start difference. First operand 597 states and 1877 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:55,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:55,169 INFO L93 Difference]: Finished difference Result 707 states and 2181 transitions. [2021-04-15 02:30:55,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:30:55,169 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:55,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:55,170 INFO L225 Difference]: With dead ends: 707 [2021-04-15 02:30:55,170 INFO L226 Difference]: Without dead ends: 691 [2021-04-15 02:30:55,170 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 281.3ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:55,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-04-15 02:30:55,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 667. [2021-04-15 02:30:55,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.165165165165165) internal successors, (2108), 666 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2108 transitions. [2021-04-15 02:30:55,177 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2108 transitions. Word has length 18 [2021-04-15 02:30:55,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:55,177 INFO L480 AbstractCegarLoop]: Abstraction has 667 states and 2108 transitions. [2021-04-15 02:30:55,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:55,177 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2108 transitions. [2021-04-15 02:30:55,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:55,178 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:55,178 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:55,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4805,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:55,378 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:55,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:55,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1686403527, now seen corresponding path program 140 times [2021-04-15 02:30:55,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:55,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261789863] [2021-04-15 02:30:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:55,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261789863] [2021-04-15 02:30:55,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954612573] [2021-04-15 02:30:55,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:55,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:55,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:55,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:55,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:55,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:55,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:55,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:55,998 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:55,998 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:55,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:56,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:56,113 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:56,113 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:56,129 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:56,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:56,130 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:56,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:56,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:56,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122600753] [2021-04-15 02:30:56,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:56,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:56,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:56,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:56,161 INFO L87 Difference]: Start difference. First operand 667 states and 2108 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:56,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:56,954 INFO L93 Difference]: Finished difference Result 772 states and 2340 transitions. [2021-04-15 02:30:56,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:30:56,955 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:56,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:56,955 INFO L225 Difference]: With dead ends: 772 [2021-04-15 02:30:56,955 INFO L226 Difference]: Without dead ends: 762 [2021-04-15 02:30:56,956 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 543.0ms TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:30:56,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-04-15 02:30:56,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 670. [2021-04-15 02:30:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 3.1689088191330343) internal successors, (2120), 669 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2120 transitions. [2021-04-15 02:30:56,962 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2120 transitions. Word has length 18 [2021-04-15 02:30:56,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:56,963 INFO L480 AbstractCegarLoop]: Abstraction has 670 states and 2120 transitions. [2021-04-15 02:30:56,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:56,963 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2120 transitions. [2021-04-15 02:30:56,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:56,963 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:56,963 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:57,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4862,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:57,164 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:57,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:57,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1757419637, now seen corresponding path program 141 times [2021-04-15 02:30:57,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:57,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625279913] [2021-04-15 02:30:57,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:57,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625279913] [2021-04-15 02:30:57,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878104294] [2021-04-15 02:30:57,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:57,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:30:57,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:57,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:57,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:57,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:57,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:57,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:57,908 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:57,909 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:57,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:58,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:58,036 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:58,037 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:58,053 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:58,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:58,054 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:58,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:58,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:58,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691955142] [2021-04-15 02:30:58,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:58,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:58,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:58,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:58,082 INFO L87 Difference]: Start difference. First operand 670 states and 2120 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:58,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:58,759 INFO L93 Difference]: Finished difference Result 788 states and 2394 transitions. [2021-04-15 02:30:58,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:30:58,759 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:30:58,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:58,760 INFO L225 Difference]: With dead ends: 788 [2021-04-15 02:30:58,760 INFO L226 Difference]: Without dead ends: 778 [2021-04-15 02:30:58,760 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 505.6ms TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:30:58,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-04-15 02:30:58,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 695. [2021-04-15 02:30:58,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.1714697406340058) internal successors, (2201), 694 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:58,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2201 transitions. [2021-04-15 02:30:58,767 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2201 transitions. Word has length 18 [2021-04-15 02:30:58,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:58,767 INFO L480 AbstractCegarLoop]: Abstraction has 695 states and 2201 transitions. [2021-04-15 02:30:58,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:58,767 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2201 transitions. [2021-04-15 02:30:58,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:30:58,768 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:58,768 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:58,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4989 [2021-04-15 02:30:58,968 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:58,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:58,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1141755321, now seen corresponding path program 142 times [2021-04-15 02:30:58,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:58,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917991822] [2021-04-15 02:30:58,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:59,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917991822] [2021-04-15 02:30:59,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667662152] [2021-04-15 02:30:59,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:30:59,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:59,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:59,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:30:59,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:59,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:59,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:30:59,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:59,769 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:30:59,769 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:30:59,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:30:59,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:30:59,871 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:30:59,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:59,889 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:30:59,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:30:59,889 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:30:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:59,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:59,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:30:59,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610299235] [2021-04-15 02:30:59,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:30:59,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:59,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:30:59,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:59,918 INFO L87 Difference]: Start difference. First operand 695 states and 2201 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:00,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:00,468 INFO L93 Difference]: Finished difference Result 836 states and 2495 transitions. [2021-04-15 02:31:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:31:00,468 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:31:00,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:00,469 INFO L225 Difference]: With dead ends: 836 [2021-04-15 02:31:00,469 INFO L226 Difference]: Without dead ends: 826 [2021-04-15 02:31:00,469 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 607.4ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:31:00,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-04-15 02:31:00,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 705. [2021-04-15 02:31:00,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.171875) internal successors, (2233), 704 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:00,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2233 transitions. [2021-04-15 02:31:00,476 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2233 transitions. Word has length 18 [2021-04-15 02:31:00,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:00,476 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 2233 transitions. [2021-04-15 02:31:00,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:00,476 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2233 transitions. [2021-04-15 02:31:00,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:31:00,477 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:00,477 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:00,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5180,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:00,677 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:00,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:00,678 INFO L82 PathProgramCache]: Analyzing trace with hash 763969291, now seen corresponding path program 143 times [2021-04-15 02:31:00,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:00,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361179945] [2021-04-15 02:31:00,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:00,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361179945] [2021-04-15 02:31:00,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175456767] [2021-04-15 02:31:00,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:00,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:31:00,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:00,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:31:00,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:01,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:01,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:01,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:01,316 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:01,316 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:01,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:01,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:01,524 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:31:01,525 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:01,544 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:01,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:01,545 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:31:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:01,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:01,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:31:01,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986604370] [2021-04-15 02:31:01,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:01,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:01,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:01,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:01,583 INFO L87 Difference]: Start difference. First operand 705 states and 2233 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:02,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:02,409 INFO L93 Difference]: Finished difference Result 890 states and 2620 transitions. [2021-04-15 02:31:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:31:02,410 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:31:02,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:02,411 INFO L225 Difference]: With dead ends: 890 [2021-04-15 02:31:02,411 INFO L226 Difference]: Without dead ends: 868 [2021-04-15 02:31:02,411 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 762.5ms TimeCoverageRelationStatistics Valid=286, Invalid=1876, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 02:31:02,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-04-15 02:31:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 705. [2021-04-15 02:31:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:02,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-04-15 02:31:02,418 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-04-15 02:31:02,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:02,418 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-04-15 02:31:02,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:02,418 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-04-15 02:31:02,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:31:02,418 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:02,419 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:02,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5295 [2021-04-15 02:31:02,619 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:02,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:02,619 INFO L82 PathProgramCache]: Analyzing trace with hash -288109881, now seen corresponding path program 144 times [2021-04-15 02:31:02,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:02,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787183171] [2021-04-15 02:31:02,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:02,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787183171] [2021-04-15 02:31:02,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826564025] [2021-04-15 02:31:02,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:02,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:31:02,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:02,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:31:02,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:03,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:03,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:03,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:03,257 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:03,257 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:03,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:03,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:03,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:31:03,479 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:03,494 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:03,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:03,495 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:31:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:03,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:03,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:31:03,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690854350] [2021-04-15 02:31:03,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:03,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:03,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:03,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:03,525 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:04,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:04,116 INFO L93 Difference]: Finished difference Result 803 states and 2447 transitions. [2021-04-15 02:31:04,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:31:04,117 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:31:04,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:04,118 INFO L225 Difference]: With dead ends: 803 [2021-04-15 02:31:04,118 INFO L226 Difference]: Without dead ends: 798 [2021-04-15 02:31:04,118 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 616.0ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:31:04,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-04-15 02:31:04,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 705. [2021-04-15 02:31:04,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:04,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-04-15 02:31:04,125 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-04-15 02:31:04,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:04,125 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-04-15 02:31:04,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:04,125 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-04-15 02:31:04,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:31:04,126 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:04,126 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:04,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5431 [2021-04-15 02:31:04,326 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:04,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:04,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1457174155, now seen corresponding path program 145 times [2021-04-15 02:31:04,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:04,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133948878] [2021-04-15 02:31:04,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:04,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133948878] [2021-04-15 02:31:04,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415039397] [2021-04-15 02:31:04,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:04,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:31:04,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:04,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:04,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:05,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:05,251 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:05,251 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:05,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:05,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:05,349 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:31:05,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:05,366 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:05,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:05,367 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:31:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:05,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:05,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:31:05,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3765106] [2021-04-15 02:31:05,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:05,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:05,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:05,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:05,396 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:06,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:06,047 INFO L93 Difference]: Finished difference Result 813 states and 2474 transitions. [2021-04-15 02:31:06,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:31:06,052 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:31:06,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:06,053 INFO L225 Difference]: With dead ends: 813 [2021-04-15 02:31:06,053 INFO L226 Difference]: Without dead ends: 808 [2021-04-15 02:31:06,053 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 652.3ms TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:31:06,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-04-15 02:31:06,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 705. [2021-04-15 02:31:06,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:06,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-04-15 02:31:06,060 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-04-15 02:31:06,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:06,060 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-04-15 02:31:06,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:06,060 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-04-15 02:31:06,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:31:06,061 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:06,061 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:06,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5584,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:06,263 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:06,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:06,263 INFO L82 PathProgramCache]: Analyzing trace with hash -646443817, now seen corresponding path program 146 times [2021-04-15 02:31:06,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:06,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574215889] [2021-04-15 02:31:06,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:06,364 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:06,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574215889] [2021-04-15 02:31:06,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311857952] [2021-04-15 02:31:06,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:06,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:06,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:06,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:31:06,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:06,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:06,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:06,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:06,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:06,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:06,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:31:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:06,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:06,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:31:06,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366814162] [2021-04-15 02:31:06,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:06,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:06,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:06,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:06,781 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:07,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:07,146 INFO L93 Difference]: Finished difference Result 751 states and 2311 transitions. [2021-04-15 02:31:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:31:07,147 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:31:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:07,148 INFO L225 Difference]: With dead ends: 751 [2021-04-15 02:31:07,148 INFO L226 Difference]: Without dead ends: 733 [2021-04-15 02:31:07,148 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 344.8ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:31:07,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-04-15 02:31:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 705. [2021-04-15 02:31:07,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.164772727272727) internal successors, (2228), 704 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:07,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2228 transitions. [2021-04-15 02:31:07,155 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2228 transitions. Word has length 18 [2021-04-15 02:31:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:07,155 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 2228 transitions. [2021-04-15 02:31:07,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2228 transitions. [2021-04-15 02:31:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:31:07,156 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:07,156 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:07,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5766,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:07,356 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:07,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1571255993, now seen corresponding path program 147 times [2021-04-15 02:31:07,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:07,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271017630] [2021-04-15 02:31:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:07,452 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:07,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271017630] [2021-04-15 02:31:07,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193048506] [2021-04-15 02:31:07,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:07,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:31:07,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:07,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:31:07,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:07,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:07,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:07,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:08,016 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:08,017 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:08,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:08,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:08,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:31:08,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:08,208 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:08,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:08,208 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:31:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:08,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:08,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:31:08,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088109349] [2021-04-15 02:31:08,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:08,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:08,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:08,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:08,237 INFO L87 Difference]: Start difference. First operand 705 states and 2228 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:09,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:09,059 INFO L93 Difference]: Finished difference Result 846 states and 2546 transitions. [2021-04-15 02:31:09,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:31:09,059 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:31:09,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:09,060 INFO L225 Difference]: With dead ends: 846 [2021-04-15 02:31:09,060 INFO L226 Difference]: Without dead ends: 836 [2021-04-15 02:31:09,061 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 798.2ms TimeCoverageRelationStatistics Valid=272, Invalid=1708, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 02:31:09,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-04-15 02:31:09,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 705. [2021-04-15 02:31:09,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.164772727272727) internal successors, (2228), 704 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:09,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2228 transitions. [2021-04-15 02:31:09,068 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2228 transitions. Word has length 18 [2021-04-15 02:31:09,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:09,068 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 2228 transitions. [2021-04-15 02:31:09,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:09,068 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2228 transitions. [2021-04-15 02:31:09,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:31:09,068 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:09,068 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:09,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5844,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:09,269 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:09,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1456254125, now seen corresponding path program 148 times [2021-04-15 02:31:09,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:09,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479670405] [2021-04-15 02:31:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:09,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479670405] [2021-04-15 02:31:09,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064089660] [2021-04-15 02:31:09,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:09,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:09,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:09,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:31:09,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:09,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:09,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:09,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:09,955 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:09,956 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:09,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:10,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:10,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:31:10,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:10,050 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:10,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:10,051 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:31:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:10,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:10,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:31:10,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025598477] [2021-04-15 02:31:10,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:10,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:10,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:10,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:10,081 INFO L87 Difference]: Start difference. First operand 705 states and 2228 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:11,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:11,016 INFO L93 Difference]: Finished difference Result 871 states and 2573 transitions. [2021-04-15 02:31:11,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:31:11,017 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:31:11,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:11,018 INFO L225 Difference]: With dead ends: 871 [2021-04-15 02:31:11,018 INFO L226 Difference]: Without dead ends: 856 [2021-04-15 02:31:11,019 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 871.2ms TimeCoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 02:31:11,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-04-15 02:31:11,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 706. [2021-04-15 02:31:11,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.1659574468085108) internal successors, (2232), 705 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:11,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2232 transitions. [2021-04-15 02:31:11,033 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2232 transitions. Word has length 18 [2021-04-15 02:31:11,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:11,033 INFO L480 AbstractCegarLoop]: Abstraction has 706 states and 2232 transitions. [2021-04-15 02:31:11,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:11,033 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2232 transitions. [2021-04-15 02:31:11,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:31:11,033 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:11,033 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:11,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5999,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:11,234 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:11,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:11,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1093429135, now seen corresponding path program 149 times [2021-04-15 02:31:11,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:11,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672716676] [2021-04-15 02:31:11,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:11,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672716676] [2021-04-15 02:31:11,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429649203] [2021-04-15 02:31:11,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:11,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:31:11,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:11,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:31:11,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:11,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:11,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:11,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:11,904 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:11,905 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:11,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:12,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:12,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:31:12,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:12,145 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:12,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:12,146 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:31:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:12,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:12,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:31:12,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389883282] [2021-04-15 02:31:12,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:12,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:12,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:12,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:12,184 INFO L87 Difference]: Start difference. First operand 706 states and 2232 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:12,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:12,908 INFO L93 Difference]: Finished difference Result 805 states and 2457 transitions. [2021-04-15 02:31:12,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:31:12,908 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:31:12,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:12,909 INFO L225 Difference]: With dead ends: 805 [2021-04-15 02:31:12,909 INFO L226 Difference]: Without dead ends: 800 [2021-04-15 02:31:12,910 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 738.8ms TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:31:12,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-04-15 02:31:12,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 706. [2021-04-15 02:31:12,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.1659574468085108) internal successors, (2232), 705 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:12,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2232 transitions. [2021-04-15 02:31:12,917 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2232 transitions. Word has length 18 [2021-04-15 02:31:12,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:12,917 INFO L480 AbstractCegarLoop]: Abstraction has 706 states and 2232 transitions. [2021-04-15 02:31:12,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:12,917 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2232 transitions. [2021-04-15 02:31:12,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:31:12,918 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:12,918 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:13,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6113 [2021-04-15 02:31:13,118 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:13,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:13,118 INFO L82 PathProgramCache]: Analyzing trace with hash 2050717319, now seen corresponding path program 150 times [2021-04-15 02:31:13,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:13,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167658616] [2021-04-15 02:31:13,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:13,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167658616] [2021-04-15 02:31:13,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784671228] [2021-04-15 02:31:13,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:13,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:31:13,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:13,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:31:13,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:13,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:13,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:13,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:13,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:13,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:13,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-04-15 02:31:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:13,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:13,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:31:13,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440841602] [2021-04-15 02:31:13,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:31:13,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:13,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:31:13,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:31:13,653 INFO L87 Difference]: Start difference. First operand 706 states and 2232 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:14,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:14,060 INFO L93 Difference]: Finished difference Result 817 states and 2547 transitions. [2021-04-15 02:31:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:31:14,060 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:31:14,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:14,061 INFO L225 Difference]: With dead ends: 817 [2021-04-15 02:31:14,061 INFO L226 Difference]: Without dead ends: 803 [2021-04-15 02:31:14,062 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 303.3ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:31:14,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-04-15 02:31:14,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 780. [2021-04-15 02:31:14,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.184852374839538) internal successors, (2481), 779 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:14,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2481 transitions. [2021-04-15 02:31:14,069 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2481 transitions. Word has length 18 [2021-04-15 02:31:14,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:14,069 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2481 transitions. [2021-04-15 02:31:14,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:14,069 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2481 transitions. [2021-04-15 02:31:14,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:31:14,070 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:14,070 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:14,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6254 [2021-04-15 02:31:14,270 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:14,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:14,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1500666617, now seen corresponding path program 151 times [2021-04-15 02:31:14,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:14,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211638187] [2021-04-15 02:31:14,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:14,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211638187] [2021-04-15 02:31:14,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503197095] [2021-04-15 02:31:14,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:14,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:31:14,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:14,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:14,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:14,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:14,893 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:14,894 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:14,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:14,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:14,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:31:14,981 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:14,997 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:14,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:14,998 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:31:15,029 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:15,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:15,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:31:15,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837868767] [2021-04-15 02:31:15,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:31:15,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:15,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:31:15,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:31:15,030 INFO L87 Difference]: Start difference. First operand 780 states and 2481 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:15,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:15,833 INFO L93 Difference]: Finished difference Result 881 states and 2702 transitions. [2021-04-15 02:31:15,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 02:31:15,834 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:31:15,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:15,835 INFO L225 Difference]: With dead ends: 881 [2021-04-15 02:31:15,835 INFO L226 Difference]: Without dead ends: 871 [2021-04-15 02:31:15,835 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 597.2ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:31:15,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-04-15 02:31:15,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 783. [2021-04-15 02:31:15,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.187979539641944) internal successors, (2493), 782 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:15,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2493 transitions. [2021-04-15 02:31:15,843 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2493 transitions. Word has length 18 [2021-04-15 02:31:15,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:15,843 INFO L480 AbstractCegarLoop]: Abstraction has 783 states and 2493 transitions. [2021-04-15 02:31:15,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:15,843 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2493 transitions. [2021-04-15 02:31:15,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:31:15,844 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:15,844 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:16,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6333 [2021-04-15 02:31:16,044 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:16,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:16,044 INFO L82 PathProgramCache]: Analyzing trace with hash -649522485, now seen corresponding path program 152 times [2021-04-15 02:31:16,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:16,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697126931] [2021-04-15 02:31:16,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:16,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697126931] [2021-04-15 02:31:16,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571161435] [2021-04-15 02:31:16,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:16,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:16,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:16,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:31:16,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:16,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:16,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:16,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:16,662 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:16,663 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:16,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:16,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:16,789 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:31:16,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:16,806 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:16,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:16,806 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:31:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:16,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:16,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:31:16,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471161411] [2021-04-15 02:31:16,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:31:16,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:16,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:31:16,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:31:16,835 INFO L87 Difference]: Start difference. First operand 783 states and 2493 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:17,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:17,592 INFO L93 Difference]: Finished difference Result 914 states and 2779 transitions. [2021-04-15 02:31:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:31:17,593 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:31:17,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:17,594 INFO L225 Difference]: With dead ends: 914 [2021-04-15 02:31:17,594 INFO L226 Difference]: Without dead ends: 904 [2021-04-15 02:31:17,594 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 569.0ms TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:31:17,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-04-15 02:31:17,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 808. [2021-04-15 02:31:17,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.195786864931846) internal successors, (2579), 807 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:17,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2579 transitions. [2021-04-15 02:31:17,603 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2579 transitions. Word has length 18 [2021-04-15 02:31:17,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:17,603 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 2579 transitions. [2021-04-15 02:31:17,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2579 transitions. [2021-04-15 02:31:17,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:31:17,604 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:17,604 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:17,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6443 [2021-04-15 02:31:17,804 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:17,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:17,804 INFO L82 PathProgramCache]: Analyzing trace with hash -33858169, now seen corresponding path program 153 times [2021-04-15 02:31:17,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:17,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034513024] [2021-04-15 02:31:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:17,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034513024] [2021-04-15 02:31:17,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472232302] [2021-04-15 02:31:17,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:17,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:31:17,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:17,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:31:17,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:18,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:18,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:18,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:18,500 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:18,501 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:18,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:18,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:18,687 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:31:18,687 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:18,703 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:18,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:18,704 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:31:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:18,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:18,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:31:18,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852658809] [2021-04-15 02:31:18,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:31:18,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:18,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:31:18,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:31:18,733 INFO L87 Difference]: Start difference. First operand 808 states and 2579 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:19,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:19,580 INFO L93 Difference]: Finished difference Result 960 states and 2894 transitions. [2021-04-15 02:31:19,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:31:19,581 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:31:19,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:19,582 INFO L225 Difference]: With dead ends: 960 [2021-04-15 02:31:19,582 INFO L226 Difference]: Without dead ends: 950 [2021-04-15 02:31:19,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 620.0ms TimeCoverageRelationStatistics Valid=206, Invalid=1516, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:31:19,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-04-15 02:31:19,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 829. [2021-04-15 02:31:19,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.1956521739130435) internal successors, (2646), 828 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:19,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2646 transitions. [2021-04-15 02:31:19,590 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2646 transitions. Word has length 18 [2021-04-15 02:31:19,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:19,590 INFO L480 AbstractCegarLoop]: Abstraction has 829 states and 2646 transitions. [2021-04-15 02:31:19,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:19,591 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2646 transitions. [2021-04-15 02:31:19,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:31:19,591 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:19,591 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:19,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6573,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:19,792 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:19,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:19,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1871866443, now seen corresponding path program 154 times [2021-04-15 02:31:19,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:19,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144034441] [2021-04-15 02:31:19,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:19,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144034441] [2021-04-15 02:31:19,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550838798] [2021-04-15 02:31:19,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:19,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:19,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:19,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:31:19,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:20,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:20,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:20,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:20,424 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:20,424 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:20,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:20,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:20,539 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:31:20,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:20,556 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:20,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:20,557 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:31:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:20,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:20,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 02:31:20,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375006507] [2021-04-15 02:31:20,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:31:20,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:20,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:31:20,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:31:20,587 INFO L87 Difference]: Start difference. First operand 829 states and 2646 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:21,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:21,246 INFO L93 Difference]: Finished difference Result 966 states and 2916 transitions. [2021-04-15 02:31:21,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:31:21,247 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:31:21,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:21,248 INFO L225 Difference]: With dead ends: 966 [2021-04-15 02:31:21,248 INFO L226 Difference]: Without dead ends: 951 [2021-04-15 02:31:21,248 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 659.3ms TimeCoverageRelationStatistics Valid=228, Invalid=1494, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:31:21,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-04-15 02:31:21,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 835. [2021-04-15 02:31:21,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:21,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-04-15 02:31:21,257 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-04-15 02:31:21,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:21,257 INFO L480 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-04-15 02:31:21,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:21,257 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-04-15 02:31:21,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:31:21,258 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:21,258 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:21,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6731,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:21,461 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:21,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:21,461 INFO L82 PathProgramCache]: Analyzing trace with hash 819787271, now seen corresponding path program 155 times [2021-04-15 02:31:21,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:21,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734960941] [2021-04-15 02:31:21,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:21,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:21,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734960941] [2021-04-15 02:31:21,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914931535] [2021-04-15 02:31:21,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:21,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:31:21,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:21,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:31:21,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:21,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:21,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:21,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:22,098 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:22,098 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:22,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:22,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:22,196 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:31:22,196 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:22,212 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:22,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:22,213 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:31:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:22,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:22,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:31:22,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380809632] [2021-04-15 02:31:22,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:22,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:22,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:22,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:22,242 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:23,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:23,101 INFO L93 Difference]: Finished difference Result 1010 states and 3017 transitions. [2021-04-15 02:31:23,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:31:23,102 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:31:23,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:23,103 INFO L225 Difference]: With dead ends: 1010 [2021-04-15 02:31:23,103 INFO L226 Difference]: Without dead ends: 995 [2021-04-15 02:31:23,103 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 875.2ms TimeCoverageRelationStatistics Valid=312, Invalid=1850, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 02:31:23,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-04-15 02:31:23,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 835. [2021-04-15 02:31:23,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-04-15 02:31:23,115 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-04-15 02:31:23,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:23,115 INFO L480 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-04-15 02:31:23,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:23,115 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-04-15 02:31:23,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:31:23,117 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:23,117 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:23,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6846 [2021-04-15 02:31:23,339 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:23,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:23,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1729895989, now seen corresponding path program 156 times [2021-04-15 02:31:23,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:23,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277014209] [2021-04-15 02:31:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:23,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277014209] [2021-04-15 02:31:23,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365823411] [2021-04-15 02:31:23,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:23,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:31:23,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:23,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:31:23,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:23,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:23,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:23,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:24,080 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:24,081 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:24,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:24,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:24,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:31:24,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:24,237 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:24,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:24,238 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:31:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:24,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:24,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:31:24,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904352042] [2021-04-15 02:31:24,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:24,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:24,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:24,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:24,269 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:24,986 INFO L93 Difference]: Finished difference Result 964 states and 2957 transitions. [2021-04-15 02:31:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:31:24,987 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:31:24,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:24,988 INFO L225 Difference]: With dead ends: 964 [2021-04-15 02:31:24,988 INFO L226 Difference]: Without dead ends: 959 [2021-04-15 02:31:24,988 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 732.5ms TimeCoverageRelationStatistics Valid=224, Invalid=1258, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:31:24,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-04-15 02:31:24,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 835. [2021-04-15 02:31:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:24,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-04-15 02:31:24,996 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-04-15 02:31:24,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:24,996 INFO L480 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-04-15 02:31:24,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:24,996 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-04-15 02:31:24,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:31:24,997 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:24,997 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:25,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6942,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:25,197 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:25,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:25,198 INFO L82 PathProgramCache]: Analyzing trace with hash 834301575, now seen corresponding path program 157 times [2021-04-15 02:31:25,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:25,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609142418] [2021-04-15 02:31:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:25,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609142418] [2021-04-15 02:31:25,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931327964] [2021-04-15 02:31:25,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:25,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 02:31:25,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:25,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:25,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-04-15 02:31:25,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:25,874 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 02:31:25,874 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-04-15 02:31:25,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-04-15 02:31:25,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:31:25,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:31:25,970 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:25,986 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:31:25,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:25,987 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-04-15 02:31:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:26,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:26,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 02:31:26,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620858074] [2021-04-15 02:31:26,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:26,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:26,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:26,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:26,019 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:26,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:26,755 INFO L93 Difference]: Finished difference Result 980 states and 3003 transitions. [2021-04-15 02:31:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:31:26,755 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 02:31:26,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:26,756 INFO L225 Difference]: With dead ends: 980 [2021-04-15 02:31:26,756 INFO L226 Difference]: Without dead ends: 975 [2021-04-15 02:31:26,756 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 773.2ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:31:26,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-04-15 02:31:26,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 837. [2021-04-15 02:31:26,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.187799043062201) internal successors, (2665), 836 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:26,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2665 transitions. [2021-04-15 02:31:26,765 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2665 transitions. Word has length 18 [2021-04-15 02:31:26,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:26,765 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 2665 transitions. [2021-04-15 02:31:26,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:26,765 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2665 transitions. [2021-04-15 02:31:26,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:26,766 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:26,766 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:26,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7124 [2021-04-15 02:31:26,966 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:26,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:26,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1301661189, now seen corresponding path program 158 times [2021-04-15 02:31:26,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:26,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41817326] [2021-04-15 02:31:26,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:27,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41817326] [2021-04-15 02:31:27,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133555562] [2021-04-15 02:31:27,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:27,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:27,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:27,166 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:31:27,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:27,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:27,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:28,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:28,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:28,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:28,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:28,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:28,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:31:28,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314762586] [2021-04-15 02:31:28,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:31:28,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:28,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:31:28,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:31:28,010 INFO L87 Difference]: Start difference. First operand 837 states and 2665 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:28,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:28,378 INFO L93 Difference]: Finished difference Result 905 states and 2785 transitions. [2021-04-15 02:31:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:31:28,379 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:28,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:28,380 INFO L225 Difference]: With dead ends: 905 [2021-04-15 02:31:28,380 INFO L226 Difference]: Without dead ends: 883 [2021-04-15 02:31:28,380 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 479.4ms TimeCoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:31:28,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-04-15 02:31:28,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 840. [2021-04-15 02:31:28,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.1835518474374256) internal successors, (2671), 839 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:28,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2671 transitions. [2021-04-15 02:31:28,388 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2671 transitions. Word has length 19 [2021-04-15 02:31:28,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:28,388 INFO L480 AbstractCegarLoop]: Abstraction has 840 states and 2671 transitions. [2021-04-15 02:31:28,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:28,388 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2671 transitions. [2021-04-15 02:31:28,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:28,389 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:28,389 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:28,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7226,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:28,590 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:28,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:28,590 INFO L82 PathProgramCache]: Analyzing trace with hash -649128821, now seen corresponding path program 159 times [2021-04-15 02:31:28,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:28,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463833109] [2021-04-15 02:31:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:28,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463833109] [2021-04-15 02:31:28,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058565144] [2021-04-15 02:31:28,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:28,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:31:28,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:28,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:31:28,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:29,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:29,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:29,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:29,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:29,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:29,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:29,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:29,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:31:29,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759169769] [2021-04-15 02:31:29,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:31:29,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:29,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:31:29,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:31:29,581 INFO L87 Difference]: Start difference. First operand 840 states and 2671 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:30,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:30,062 INFO L93 Difference]: Finished difference Result 899 states and 2774 transitions. [2021-04-15 02:31:30,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:31:30,063 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:30,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:30,064 INFO L225 Difference]: With dead ends: 899 [2021-04-15 02:31:30,064 INFO L226 Difference]: Without dead ends: 880 [2021-04-15 02:31:30,064 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 473.8ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:31:30,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-04-15 02:31:30,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 842. [2021-04-15 02:31:30,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.1712247324613556) internal successors, (2667), 841 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2667 transitions. [2021-04-15 02:31:30,072 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2667 transitions. Word has length 19 [2021-04-15 02:31:30,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:30,072 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2667 transitions. [2021-04-15 02:31:30,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:30,073 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2667 transitions. [2021-04-15 02:31:30,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:30,073 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:30,073 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:30,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7455 [2021-04-15 02:31:30,274 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:30,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:30,274 INFO L82 PathProgramCache]: Analyzing trace with hash 203204603, now seen corresponding path program 160 times [2021-04-15 02:31:30,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:30,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882179118] [2021-04-15 02:31:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:30,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882179118] [2021-04-15 02:31:30,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043733303] [2021-04-15 02:31:30,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:30,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:30,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:30,453 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:31:30,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:30,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:30,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:31,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:31,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:31,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:31,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:31,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:31,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:31:31,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628173470] [2021-04-15 02:31:31,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:31:31,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:31,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:31:31,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:31:31,074 INFO L87 Difference]: Start difference. First operand 842 states and 2667 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:31,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:31,499 INFO L93 Difference]: Finished difference Result 889 states and 2752 transitions. [2021-04-15 02:31:31,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:31:31,500 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:31,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:31,501 INFO L225 Difference]: With dead ends: 889 [2021-04-15 02:31:31,501 INFO L226 Difference]: Without dead ends: 878 [2021-04-15 02:31:31,501 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 500.3ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:31:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-04-15 02:31:31,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 843. [2021-04-15 02:31:31,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 3.16270783847981) internal successors, (2663), 842 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:31,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2663 transitions. [2021-04-15 02:31:31,509 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2663 transitions. Word has length 19 [2021-04-15 02:31:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:31,509 INFO L480 AbstractCegarLoop]: Abstraction has 843 states and 2663 transitions. [2021-04-15 02:31:31,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2663 transitions. [2021-04-15 02:31:31,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:31,510 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:31,510 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:31,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7663 [2021-04-15 02:31:31,711 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:31,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:31,711 INFO L82 PathProgramCache]: Analyzing trace with hash 946787963, now seen corresponding path program 161 times [2021-04-15 02:31:31,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:31,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921129347] [2021-04-15 02:31:31,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:31,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921129347] [2021-04-15 02:31:31,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237504548] [2021-04-15 02:31:31,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:31,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:31:31,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:31,875 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:31:31,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:32,252 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:31:32,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:32,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:31:33,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:31:33,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:33,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:33,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:33,894 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:31:33,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:33,895 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:31:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:33,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:33,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:31:33,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214797671] [2021-04-15 02:31:33,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:31:33,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:33,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:31:33,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:31:33,932 INFO L87 Difference]: Start difference. First operand 843 states and 2663 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:34,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:34,464 INFO L93 Difference]: Finished difference Result 922 states and 2811 transitions. [2021-04-15 02:31:34,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:31:34,464 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:34,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:34,465 INFO L225 Difference]: With dead ends: 922 [2021-04-15 02:31:34,465 INFO L226 Difference]: Without dead ends: 910 [2021-04-15 02:31:34,465 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 442.5ms TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:31:34,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-04-15 02:31:34,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 839. [2021-04-15 02:31:34,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.1658711217183773) internal successors, (2653), 838 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:34,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2653 transitions. [2021-04-15 02:31:34,474 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2653 transitions. Word has length 19 [2021-04-15 02:31:34,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:34,474 INFO L480 AbstractCegarLoop]: Abstraction has 839 states and 2653 transitions. [2021-04-15 02:31:34,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:34,474 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2653 transitions. [2021-04-15 02:31:34,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:34,475 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:34,475 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:34,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7792,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:34,675 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:34,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:34,676 INFO L82 PathProgramCache]: Analyzing trace with hash 274927871, now seen corresponding path program 162 times [2021-04-15 02:31:34,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:34,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823172161] [2021-04-15 02:31:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:34,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823172161] [2021-04-15 02:31:34,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758558952] [2021-04-15 02:31:34,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:34,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:31:34,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:34,806 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:31:34,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:35,171 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:31:35,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:35,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:31:35,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:31:35,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:35,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:36,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:36,155 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:31:36,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:36,156 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:31:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:36,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:36,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:36,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538972240] [2021-04-15 02:31:36,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:36,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:36,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:36,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:36,191 INFO L87 Difference]: Start difference. First operand 839 states and 2653 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:36,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:36,857 INFO L93 Difference]: Finished difference Result 960 states and 2881 transitions. [2021-04-15 02:31:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:31:36,858 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:36,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:36,859 INFO L225 Difference]: With dead ends: 960 [2021-04-15 02:31:36,859 INFO L226 Difference]: Without dead ends: 946 [2021-04-15 02:31:36,859 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 454.0ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:31:36,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-04-15 02:31:36,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 844. [2021-04-15 02:31:36,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.1589561091340452) internal successors, (2663), 843 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2663 transitions. [2021-04-15 02:31:36,868 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2663 transitions. Word has length 19 [2021-04-15 02:31:36,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:36,868 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 2663 transitions. [2021-04-15 02:31:36,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:36,868 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2663 transitions. [2021-04-15 02:31:36,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:36,869 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:36,869 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:37,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8372 [2021-04-15 02:31:37,070 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:37,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:37,070 INFO L82 PathProgramCache]: Analyzing trace with hash -386335912, now seen corresponding path program 163 times [2021-04-15 02:31:37,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:37,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329405716] [2021-04-15 02:31:37,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:37,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329405716] [2021-04-15 02:31:37,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717476263] [2021-04-15 02:31:37,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:37,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:31:37,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:37,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:37,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:31:37,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470826793] [2021-04-15 02:31:37,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:31:37,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:37,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:31:37,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:31:37,176 INFO L87 Difference]: Start difference. First operand 844 states and 2663 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:37,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:37,241 INFO L93 Difference]: Finished difference Result 1106 states and 3133 transitions. [2021-04-15 02:31:37,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:31:37,241 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:37,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:37,243 INFO L225 Difference]: With dead ends: 1106 [2021-04-15 02:31:37,243 INFO L226 Difference]: Without dead ends: 1106 [2021-04-15 02:31:37,243 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:31:37,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-04-15 02:31:37,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 852. [2021-04-15 02:31:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.1656874265569916) internal successors, (2694), 851 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2694 transitions. [2021-04-15 02:31:37,252 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2694 transitions. Word has length 19 [2021-04-15 02:31:37,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:37,252 INFO L480 AbstractCegarLoop]: Abstraction has 852 states and 2694 transitions. [2021-04-15 02:31:37,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2694 transitions. [2021-04-15 02:31:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:37,253 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:37,254 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:37,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8777,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:37,469 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:37,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:37,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1288290309, now seen corresponding path program 164 times [2021-04-15 02:31:37,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:37,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589542468] [2021-04-15 02:31:37,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:37,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589542468] [2021-04-15 02:31:37,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126476118] [2021-04-15 02:31:37,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:37,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:37,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:37,602 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:31:37,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:37,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:37,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:38,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:38,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:38,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:38,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:38,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:38,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:38,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322774043] [2021-04-15 02:31:38,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:38,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:38,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:38,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:38,258 INFO L87 Difference]: Start difference. First operand 852 states and 2694 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:38,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:38,663 INFO L93 Difference]: Finished difference Result 911 states and 2818 transitions. [2021-04-15 02:31:38,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:31:38,664 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:38,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:38,665 INFO L225 Difference]: With dead ends: 911 [2021-04-15 02:31:38,665 INFO L226 Difference]: Without dead ends: 900 [2021-04-15 02:31:38,665 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 400.0ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:31:38,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-04-15 02:31:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 856. [2021-04-15 02:31:38,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.160233918128655) internal successors, (2702), 855 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:38,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2702 transitions. [2021-04-15 02:31:38,677 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2702 transitions. Word has length 19 [2021-04-15 02:31:38,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:38,677 INFO L480 AbstractCegarLoop]: Abstraction has 856 states and 2702 transitions. [2021-04-15 02:31:38,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:38,677 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2702 transitions. [2021-04-15 02:31:38,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:38,678 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:38,678 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:38,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8778,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:38,897 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:38,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:38,897 INFO L82 PathProgramCache]: Analyzing trace with hash -544706949, now seen corresponding path program 165 times [2021-04-15 02:31:38,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:38,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312860335] [2021-04-15 02:31:38,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:39,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312860335] [2021-04-15 02:31:39,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272403285] [2021-04-15 02:31:39,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:39,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:31:39,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:39,031 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:31:39,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:39,391 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:31:39,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:39,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:31:39,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:31:39,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:39,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:40,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:40,566 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:31:40,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:40,567 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:31:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:40,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:40,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:40,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635015664] [2021-04-15 02:31:40,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:40,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:40,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:40,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:40,601 INFO L87 Difference]: Start difference. First operand 856 states and 2702 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:41,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:41,090 INFO L93 Difference]: Finished difference Result 946 states and 2880 transitions. [2021-04-15 02:31:41,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:31:41,090 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:41,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:41,091 INFO L225 Difference]: With dead ends: 946 [2021-04-15 02:31:41,091 INFO L226 Difference]: Without dead ends: 936 [2021-04-15 02:31:41,092 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 411.7ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:31:41,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-04-15 02:31:41,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 858. [2021-04-15 02:31:41,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.156359393232205) internal successors, (2705), 857 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:41,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2705 transitions. [2021-04-15 02:31:41,101 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2705 transitions. Word has length 19 [2021-04-15 02:31:41,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:41,101 INFO L480 AbstractCegarLoop]: Abstraction has 858 states and 2705 transitions. [2021-04-15 02:31:41,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:41,101 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2705 transitions. [2021-04-15 02:31:41,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:41,102 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:41,102 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:41,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8916,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:41,302 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:41,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:41,302 INFO L82 PathProgramCache]: Analyzing trace with hash 306437183, now seen corresponding path program 166 times [2021-04-15 02:31:41,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:41,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888964766] [2021-04-15 02:31:41,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:41,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888964766] [2021-04-15 02:31:41,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149030804] [2021-04-15 02:31:41,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:41,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:41,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:41,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:31:41,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:41,780 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:31:41,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:41,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:31:42,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:31:43,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:43,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:43,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:43,403 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:31:43,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:43,404 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:31:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:43,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:43,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:43,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570545411] [2021-04-15 02:31:43,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:43,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:43,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:43,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:43,439 INFO L87 Difference]: Start difference. First operand 858 states and 2705 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:44,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:44,071 INFO L93 Difference]: Finished difference Result 1005 states and 2998 transitions. [2021-04-15 02:31:44,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:31:44,072 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:44,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:44,073 INFO L225 Difference]: With dead ends: 1005 [2021-04-15 02:31:44,073 INFO L226 Difference]: Without dead ends: 993 [2021-04-15 02:31:44,073 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 486.3ms TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:31:44,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-04-15 02:31:44,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 865. [2021-04-15 02:31:44,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.1481481481481484) internal successors, (2720), 864 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:44,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2720 transitions. [2021-04-15 02:31:44,083 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2720 transitions. Word has length 19 [2021-04-15 02:31:44,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:44,083 INFO L480 AbstractCegarLoop]: Abstraction has 865 states and 2720 transitions. [2021-04-15 02:31:44,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:44,083 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2720 transitions. [2021-04-15 02:31:44,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:44,084 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:44,084 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:44,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9322 [2021-04-15 02:31:44,284 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:44,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:44,284 INFO L82 PathProgramCache]: Analyzing trace with hash 922101499, now seen corresponding path program 167 times [2021-04-15 02:31:44,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:44,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633857728] [2021-04-15 02:31:44,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:44,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633857728] [2021-04-15 02:31:44,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268979267] [2021-04-15 02:31:44,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:44,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:31:44,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:44,423 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:31:44,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:44,801 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:31:44,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:44,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:31:45,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:31:45,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:45,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:45,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:45,920 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:31:45,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:45,921 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:31:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:45,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:45,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:31:45,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61964807] [2021-04-15 02:31:45,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:31:45,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:45,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:31:45,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:31:45,956 INFO L87 Difference]: Start difference. First operand 865 states and 2720 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:46,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:46,819 INFO L93 Difference]: Finished difference Result 1028 states and 3047 transitions. [2021-04-15 02:31:46,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:31:46,819 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:46,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:46,820 INFO L225 Difference]: With dead ends: 1028 [2021-04-15 02:31:46,821 INFO L226 Difference]: Without dead ends: 1010 [2021-04-15 02:31:46,821 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 679.1ms TimeCoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:31:46,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-04-15 02:31:46,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 859. [2021-04-15 02:31:46,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.155011655011655) internal successors, (2707), 858 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:46,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2707 transitions. [2021-04-15 02:31:46,831 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2707 transitions. Word has length 19 [2021-04-15 02:31:46,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:46,831 INFO L480 AbstractCegarLoop]: Abstraction has 859 states and 2707 transitions. [2021-04-15 02:31:46,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:46,831 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2707 transitions. [2021-04-15 02:31:46,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:46,832 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:46,832 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:47,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9990 [2021-04-15 02:31:47,032 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:47,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:47,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1879280894, now seen corresponding path program 168 times [2021-04-15 02:31:47,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:47,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630219510] [2021-04-15 02:31:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:47,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630219510] [2021-04-15 02:31:47,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848505442] [2021-04-15 02:31:47,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:47,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:31:47,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:47,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:31:47,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:47,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:47,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:31:47,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211562174] [2021-04-15 02:31:47,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:31:47,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:47,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:31:47,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:31:47,152 INFO L87 Difference]: Start difference. First operand 859 states and 2707 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:47,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:47,249 INFO L93 Difference]: Finished difference Result 1177 states and 3295 transitions. [2021-04-15 02:31:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:31:47,250 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:47,251 INFO L225 Difference]: With dead ends: 1177 [2021-04-15 02:31:47,251 INFO L226 Difference]: Without dead ends: 1177 [2021-04-15 02:31:47,251 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:31:47,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-04-15 02:31:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 872. [2021-04-15 02:31:47,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.1607347876004592) internal successors, (2753), 871 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:47,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2753 transitions. [2021-04-15 02:31:47,262 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2753 transitions. Word has length 19 [2021-04-15 02:31:47,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:47,262 INFO L480 AbstractCegarLoop]: Abstraction has 872 states and 2753 transitions. [2021-04-15 02:31:47,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:47,262 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2753 transitions. [2021-04-15 02:31:47,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:47,263 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:47,263 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:47,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10386 [2021-04-15 02:31:47,463 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:47,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:47,463 INFO L82 PathProgramCache]: Analyzing trace with hash -311501637, now seen corresponding path program 169 times [2021-04-15 02:31:47,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:47,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581843960] [2021-04-15 02:31:47,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:47,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581843960] [2021-04-15 02:31:47,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273816435] [2021-04-15 02:31:47,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:47,638 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:31:47,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:47,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:47,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:48,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:48,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:48,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:31:48,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:31:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:48,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:48,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:31:48,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928315188] [2021-04-15 02:31:48,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:31:48,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:48,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:31:48,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:31:48,088 INFO L87 Difference]: Start difference. First operand 872 states and 2753 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:48,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:48,524 INFO L93 Difference]: Finished difference Result 931 states and 2872 transitions. [2021-04-15 02:31:48,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:31:48,525 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:48,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:48,526 INFO L225 Difference]: With dead ends: 931 [2021-04-15 02:31:48,526 INFO L226 Difference]: Without dead ends: 918 [2021-04-15 02:31:48,526 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 483.4ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:31:48,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-04-15 02:31:48,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 874. [2021-04-15 02:31:48,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.150057273768614) internal successors, (2750), 873 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:48,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2750 transitions. [2021-04-15 02:31:48,539 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2750 transitions. Word has length 19 [2021-04-15 02:31:48,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:48,539 INFO L480 AbstractCegarLoop]: Abstraction has 874 states and 2750 transitions. [2021-04-15 02:31:48,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:48,539 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2750 transitions. [2021-04-15 02:31:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:48,540 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:48,540 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:48,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10387 [2021-04-15 02:31:48,757 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:48,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:48,758 INFO L82 PathProgramCache]: Analyzing trace with hash 432081723, now seen corresponding path program 170 times [2021-04-15 02:31:48,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:48,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006369273] [2021-04-15 02:31:48,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:48,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006369273] [2021-04-15 02:31:48,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780535935] [2021-04-15 02:31:48,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:48,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:48,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:48,888 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:31:48,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:49,225 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:31:49,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:49,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:31:50,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:31:50,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:50,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:50,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:50,649 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:31:50,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:50,650 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:31:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:50,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:50,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:50,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164884274] [2021-04-15 02:31:50,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:50,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:50,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:50,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:50,686 INFO L87 Difference]: Start difference. First operand 874 states and 2750 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:51,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:51,376 INFO L93 Difference]: Finished difference Result 990 states and 2998 transitions. [2021-04-15 02:31:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:31:51,377 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:51,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:51,378 INFO L225 Difference]: With dead ends: 990 [2021-04-15 02:31:51,378 INFO L226 Difference]: Without dead ends: 980 [2021-04-15 02:31:51,378 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 479.1ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:31:51,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-04-15 02:31:51,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 876. [2021-04-15 02:31:51,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 3.1462857142857144) internal successors, (2753), 875 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2753 transitions. [2021-04-15 02:31:51,388 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2753 transitions. Word has length 19 [2021-04-15 02:31:51,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:51,389 INFO L480 AbstractCegarLoop]: Abstraction has 876 states and 2753 transitions. [2021-04-15 02:31:51,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:51,389 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2753 transitions. [2021-04-15 02:31:51,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:51,390 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:51,390 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:51,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10450,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:51,590 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:51,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:51,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1283225855, now seen corresponding path program 171 times [2021-04-15 02:31:51,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:51,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004306339] [2021-04-15 02:31:51,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:51,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004306339] [2021-04-15 02:31:51,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702116136] [2021-04-15 02:31:51,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:51,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:31:51,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:51,715 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:31:51,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:52,069 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:31:52,069 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:52,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:31:52,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:31:52,629 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-04-15 02:31:52,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:52,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:53,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:53,146 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:31:53,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:53,147 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:31:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:53,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:53,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:31:53,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799677764] [2021-04-15 02:31:53,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:31:53,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:53,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:31:53,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:31:53,182 INFO L87 Difference]: Start difference. First operand 876 states and 2753 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:53,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:53,928 INFO L93 Difference]: Finished difference Result 1048 states and 3120 transitions. [2021-04-15 02:31:53,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:31:53,929 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:53,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:53,930 INFO L225 Difference]: With dead ends: 1048 [2021-04-15 02:31:53,930 INFO L226 Difference]: Without dead ends: 1036 [2021-04-15 02:31:53,930 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 544.3ms TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:31:53,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-04-15 02:31:53,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 882. [2021-04-15 02:31:53,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.1362088535754826) internal successors, (2763), 881 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:53,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2763 transitions. [2021-04-15 02:31:53,939 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2763 transitions. Word has length 19 [2021-04-15 02:31:53,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:53,939 INFO L480 AbstractCegarLoop]: Abstraction has 882 states and 2763 transitions. [2021-04-15 02:31:53,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:53,939 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2763 transitions. [2021-04-15 02:31:53,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:53,940 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:53,940 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:54,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10927,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:54,141 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:54,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:54,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1898890171, now seen corresponding path program 172 times [2021-04-15 02:31:54,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:54,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636787414] [2021-04-15 02:31:54,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:54,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636787414] [2021-04-15 02:31:54,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732042001] [2021-04-15 02:31:54,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:54,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:54,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:54,287 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:31:54,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:54,667 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:31:54,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:54,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:31:55,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:31:55,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:55,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:55,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:55,934 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:31:55,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:55,934 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:31:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:55,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:55,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:31:55,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544631512] [2021-04-15 02:31:55,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:31:55,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:55,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:31:55,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:31:55,970 INFO L87 Difference]: Start difference. First operand 882 states and 2763 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:56,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:56,917 INFO L93 Difference]: Finished difference Result 1071 states and 3169 transitions. [2021-04-15 02:31:56,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 02:31:56,917 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:56,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:56,919 INFO L225 Difference]: With dead ends: 1071 [2021-04-15 02:31:56,919 INFO L226 Difference]: Without dead ends: 1055 [2021-04-15 02:31:56,919 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 751.4ms TimeCoverageRelationStatistics Valid=216, Invalid=1506, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:31:56,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-04-15 02:31:56,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 871. [2021-04-15 02:31:56,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.145977011494253) internal successors, (2737), 870 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:56,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2737 transitions. [2021-04-15 02:31:56,928 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2737 transitions. Word has length 19 [2021-04-15 02:31:56,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:56,928 INFO L480 AbstractCegarLoop]: Abstraction has 871 states and 2737 transitions. [2021-04-15 02:31:56,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:56,928 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2737 transitions. [2021-04-15 02:31:56,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:56,929 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:56,929 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:57,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11349 [2021-04-15 02:31:57,130 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:57,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:57,130 INFO L82 PathProgramCache]: Analyzing trace with hash -490352513, now seen corresponding path program 173 times [2021-04-15 02:31:57,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:57,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417736956] [2021-04-15 02:31:57,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:57,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417736956] [2021-04-15 02:31:57,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846741529] [2021-04-15 02:31:57,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:57,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:31:57,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:57,269 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:31:57,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:57,670 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:31:57,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:57,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:31:58,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:31:58,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:31:58,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:31:58,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:31:58,472 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:31:58,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:31:58,473 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:31:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:58,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:58,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:31:58,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178236262] [2021-04-15 02:31:58,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:31:58,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:58,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:31:58,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:31:58,508 INFO L87 Difference]: Start difference. First operand 871 states and 2737 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:59,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:59,233 INFO L93 Difference]: Finished difference Result 960 states and 2897 transitions. [2021-04-15 02:31:59,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:31:59,233 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:59,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:59,234 INFO L225 Difference]: With dead ends: 960 [2021-04-15 02:31:59,235 INFO L226 Difference]: Without dead ends: 950 [2021-04-15 02:31:59,235 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 757.0ms TimeCoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:31:59,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-04-15 02:31:59,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 873. [2021-04-15 02:31:59,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 3.145642201834862) internal successors, (2743), 872 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:59,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2743 transitions. [2021-04-15 02:31:59,245 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2743 transitions. Word has length 19 [2021-04-15 02:31:59,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:59,245 INFO L480 AbstractCegarLoop]: Abstraction has 873 states and 2743 transitions. [2021-04-15 02:31:59,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:59,245 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2743 transitions. [2021-04-15 02:31:59,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:59,247 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:59,247 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:59,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11829,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:59,468 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:59,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:59,468 INFO L82 PathProgramCache]: Analyzing trace with hash -901042152, now seen corresponding path program 174 times [2021-04-15 02:31:59,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:59,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294492051] [2021-04-15 02:31:59,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:59,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294492051] [2021-04-15 02:31:59,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594652903] [2021-04-15 02:31:59,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:59,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:31:59,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:59,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:31:59,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:59,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:59,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:31:59,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871710459] [2021-04-15 02:31:59,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:31:59,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:59,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:31:59,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:31:59,580 INFO L87 Difference]: Start difference. First operand 873 states and 2743 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:59,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:59,692 INFO L93 Difference]: Finished difference Result 1515 states and 4478 transitions. [2021-04-15 02:31:59,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:31:59,692 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:31:59,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:59,694 INFO L225 Difference]: With dead ends: 1515 [2021-04-15 02:31:59,694 INFO L226 Difference]: Without dead ends: 1515 [2021-04-15 02:31:59,694 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:31:59,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-04-15 02:31:59,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1218. [2021-04-15 02:31:59,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 3.217748562037798) internal successors, (3916), 1217 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3916 transitions. [2021-04-15 02:31:59,710 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3916 transitions. Word has length 19 [2021-04-15 02:31:59,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:59,710 INFO L480 AbstractCegarLoop]: Abstraction has 1218 states and 3916 transitions. [2021-04-15 02:31:59,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:59,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3916 transitions. [2021-04-15 02:31:59,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:31:59,712 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:59,712 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:59,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12157 [2021-04-15 02:31:59,928 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:59,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:59,929 INFO L82 PathProgramCache]: Analyzing trace with hash -95823877, now seen corresponding path program 175 times [2021-04-15 02:31:59,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:59,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011751088] [2021-04-15 02:31:59,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:00,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011751088] [2021-04-15 02:32:00,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919379620] [2021-04-15 02:32:00,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:00,086 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:00,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:00,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:00,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:00,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:00,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:00,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:00,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:00,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:00,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:32:00,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677652368] [2021-04-15 02:32:00,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:32:00,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:00,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:32:00,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:00,712 INFO L87 Difference]: Start difference. First operand 1218 states and 3916 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:01,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:01,264 INFO L93 Difference]: Finished difference Result 1253 states and 3983 transitions. [2021-04-15 02:32:01,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:32:01,265 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:01,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:01,266 INFO L225 Difference]: With dead ends: 1253 [2021-04-15 02:32:01,266 INFO L226 Difference]: Without dead ends: 1240 [2021-04-15 02:32:01,267 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 472.0ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:32:01,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-04-15 02:32:01,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1218. [2021-04-15 02:32:01,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 3.2021364009860314) internal successors, (3897), 1217 states have internal predecessors, (3897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:01,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3897 transitions. [2021-04-15 02:32:01,279 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3897 transitions. Word has length 19 [2021-04-15 02:32:01,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:01,280 INFO L480 AbstractCegarLoop]: Abstraction has 1218 states and 3897 transitions. [2021-04-15 02:32:01,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:01,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3897 transitions. [2021-04-15 02:32:01,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:01,281 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:01,281 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:01,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12158 [2021-04-15 02:32:01,481 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:01,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:01,482 INFO L82 PathProgramCache]: Analyzing trace with hash 647759483, now seen corresponding path program 176 times [2021-04-15 02:32:01,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:01,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984589766] [2021-04-15 02:32:01,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:01,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984589766] [2021-04-15 02:32:01,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486693537] [2021-04-15 02:32:01,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:01,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:01,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:01,618 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:01,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:01,967 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:32:01,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:01,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:32:02,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:32:02,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:02,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:03,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:03,639 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:32:03,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:32:03,640 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:32:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:03,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:03,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:32:03,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399500677] [2021-04-15 02:32:03,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:32:03,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:03,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:32:03,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:32:03,675 INFO L87 Difference]: Start difference. First operand 1218 states and 3897 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:04,329 INFO L93 Difference]: Finished difference Result 1328 states and 4149 transitions. [2021-04-15 02:32:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:32:04,330 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:04,331 INFO L225 Difference]: With dead ends: 1328 [2021-04-15 02:32:04,331 INFO L226 Difference]: Without dead ends: 1316 [2021-04-15 02:32:04,332 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 482.1ms TimeCoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:32:04,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-04-15 02:32:04,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1216. [2021-04-15 02:32:04,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 3.2008230452674895) internal successors, (3889), 1215 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:04,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 3889 transitions. [2021-04-15 02:32:04,344 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 3889 transitions. Word has length 19 [2021-04-15 02:32:04,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:04,344 INFO L480 AbstractCegarLoop]: Abstraction has 1216 states and 3889 transitions. [2021-04-15 02:32:04,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:04,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 3889 transitions. [2021-04-15 02:32:04,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:04,345 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:04,345 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:04,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12269 [2021-04-15 02:32:04,547 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:04,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1498903615, now seen corresponding path program 177 times [2021-04-15 02:32:04,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:04,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037759515] [2021-04-15 02:32:04,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:04,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037759515] [2021-04-15 02:32:04,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351427813] [2021-04-15 02:32:04,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:04,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:32:04,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:04,687 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:04,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:05,057 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:32:05,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:05,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:32:07,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:32:07,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:07,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:07,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:07,934 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:32:07,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:32:07,935 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:32:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:07,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:07,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:32:07,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844900914] [2021-04-15 02:32:07,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:32:07,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:07,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:32:07,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:32:07,970 INFO L87 Difference]: Start difference. First operand 1216 states and 3889 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:08,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:08,729 INFO L93 Difference]: Finished difference Result 1386 states and 4274 transitions. [2021-04-15 02:32:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:32:08,729 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:08,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:08,731 INFO L225 Difference]: With dead ends: 1386 [2021-04-15 02:32:08,731 INFO L226 Difference]: Without dead ends: 1376 [2021-04-15 02:32:08,731 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 571.7ms TimeCoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:32:08,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2021-04-15 02:32:08,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1225. [2021-04-15 02:32:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1224 states have (on average 3.195261437908497) internal successors, (3911), 1224 states have internal predecessors, (3911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 3911 transitions. [2021-04-15 02:32:08,743 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 3911 transitions. Word has length 19 [2021-04-15 02:32:08,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:08,743 INFO L480 AbstractCegarLoop]: Abstraction has 1225 states and 3911 transitions. [2021-04-15 02:32:08,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:08,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 3911 transitions. [2021-04-15 02:32:08,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:08,744 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:08,744 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:08,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12877,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:08,945 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:08,945 INFO L82 PathProgramCache]: Analyzing trace with hash 2114567931, now seen corresponding path program 178 times [2021-04-15 02:32:08,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:08,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123339618] [2021-04-15 02:32:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:09,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123339618] [2021-04-15 02:32:09,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133449753] [2021-04-15 02:32:09,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:09,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:32:09,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:09,083 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:09,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:09,455 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:32:09,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:09,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:32:10,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:32:10,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:10,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:11,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:11,135 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:32:11,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:32:11,135 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:32:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:11,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:11,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:32:11,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669504818] [2021-04-15 02:32:11,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:32:11,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:11,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:32:11,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:11,170 INFO L87 Difference]: Start difference. First operand 1225 states and 3911 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:12,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:12,129 INFO L93 Difference]: Finished difference Result 1420 states and 4365 transitions. [2021-04-15 02:32:12,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:32:12,130 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:12,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:12,132 INFO L225 Difference]: With dead ends: 1420 [2021-04-15 02:32:12,132 INFO L226 Difference]: Without dead ends: 1408 [2021-04-15 02:32:12,132 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 763.0ms TimeCoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:32:12,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-04-15 02:32:12,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1210. [2021-04-15 02:32:12,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 3.197684036393714) internal successors, (3866), 1209 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:12,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 3866 transitions. [2021-04-15 02:32:12,148 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 3866 transitions. Word has length 19 [2021-04-15 02:32:12,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:12,148 INFO L480 AbstractCegarLoop]: Abstraction has 1210 states and 3866 transitions. [2021-04-15 02:32:12,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:12,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 3866 transitions. [2021-04-15 02:32:12,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:12,149 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:12,149 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:12,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13789,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:12,356 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:12,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:12,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1223219970, now seen corresponding path program 179 times [2021-04-15 02:32:12,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:12,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098767566] [2021-04-15 02:32:12,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:12,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098767566] [2021-04-15 02:32:12,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347414704] [2021-04-15 02:32:12,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:12,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:32:12,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:12,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:32:12,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:12,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:12,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:32:12,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847727344] [2021-04-15 02:32:12,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:32:12,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:12,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:32:12,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:32:12,473 INFO L87 Difference]: Start difference. First operand 1210 states and 3866 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:12,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:12,568 INFO L93 Difference]: Finished difference Result 1527 states and 4504 transitions. [2021-04-15 02:32:12,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:32:12,569 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:12,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:12,571 INFO L225 Difference]: With dead ends: 1527 [2021-04-15 02:32:12,571 INFO L226 Difference]: Without dead ends: 1527 [2021-04-15 02:32:12,571 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:32:12,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-04-15 02:32:12,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1175. [2021-04-15 02:32:12,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1174 states have (on average 3.192504258943782) internal successors, (3748), 1174 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 3748 transitions. [2021-04-15 02:32:12,589 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 3748 transitions. Word has length 19 [2021-04-15 02:32:12,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:12,589 INFO L480 AbstractCegarLoop]: Abstraction has 1175 states and 3748 transitions. [2021-04-15 02:32:12,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:12,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 3748 transitions. [2021-04-15 02:32:12,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:12,590 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:12,590 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:12,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14461,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:12,792 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:12,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:12,792 INFO L82 PathProgramCache]: Analyzing trace with hash -274674753, now seen corresponding path program 180 times [2021-04-15 02:32:12,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:12,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587206876] [2021-04-15 02:32:12,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:12,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587206876] [2021-04-15 02:32:12,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815084142] [2021-04-15 02:32:12,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:12,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:32:12,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:12,987 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:12,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:13,419 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:32:13,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:13,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:32:13,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-04-15 02:32:13,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:13,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:13,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:13,934 INFO L628 ElimStorePlain]: treesize reduction 26, result has 40.9 percent of original size [2021-04-15 02:32:13,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:32:13,935 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:32:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:13,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:13,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:32:13,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009520083] [2021-04-15 02:32:13,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:32:13,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:13,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:32:13,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:13,971 INFO L87 Difference]: Start difference. First operand 1175 states and 3748 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:14,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:14,733 INFO L93 Difference]: Finished difference Result 1250 states and 3880 transitions. [2021-04-15 02:32:14,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:32:14,733 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:14,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:14,735 INFO L225 Difference]: With dead ends: 1250 [2021-04-15 02:32:14,735 INFO L226 Difference]: Without dead ends: 1240 [2021-04-15 02:32:14,735 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 842.4ms TimeCoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:32:14,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-04-15 02:32:14,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1176. [2021-04-15 02:32:14,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 3.1923404255319148) internal successors, (3751), 1175 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:14,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3751 transitions. [2021-04-15 02:32:14,750 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3751 transitions. Word has length 19 [2021-04-15 02:32:14,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:14,751 INFO L480 AbstractCegarLoop]: Abstraction has 1176 states and 3751 transitions. [2021-04-15 02:32:14,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:14,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3751 transitions. [2021-04-15 02:32:14,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:14,752 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:14,752 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:14,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14462,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:14,974 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:14,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:14,974 INFO L82 PathProgramCache]: Analyzing trace with hash -685364392, now seen corresponding path program 181 times [2021-04-15 02:32:14,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:14,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980567664] [2021-04-15 02:32:14,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:15,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980567664] [2021-04-15 02:32:15,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821991086] [2021-04-15 02:32:15,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:15,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:32:15,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:15,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:15,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:32:15,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725163628] [2021-04-15 02:32:15,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:32:15,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:15,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:32:15,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:32:15,098 INFO L87 Difference]: Start difference. First operand 1176 states and 3751 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:15,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:15,211 INFO L93 Difference]: Finished difference Result 1980 states and 6059 transitions. [2021-04-15 02:32:15,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:32:15,212 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:15,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:15,214 INFO L225 Difference]: With dead ends: 1980 [2021-04-15 02:32:15,214 INFO L226 Difference]: Without dead ends: 1980 [2021-04-15 02:32:15,215 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:32:15,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-04-15 02:32:15,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1733. [2021-04-15 02:32:15,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1733 states, 1732 states have (on average 3.25) internal successors, (5629), 1732 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 5629 transitions. [2021-04-15 02:32:15,236 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 5629 transitions. Word has length 19 [2021-04-15 02:32:15,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:15,236 INFO L480 AbstractCegarLoop]: Abstraction has 1733 states and 5629 transitions. [2021-04-15 02:32:15,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:15,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 5629 transitions. [2021-04-15 02:32:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:15,237 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:15,237 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:15,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14677 [2021-04-15 02:32:15,438 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:15,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:15,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1326753925, now seen corresponding path program 182 times [2021-04-15 02:32:15,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:15,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894858888] [2021-04-15 02:32:15,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:15,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894858888] [2021-04-15 02:32:15,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88666161] [2021-04-15 02:32:15,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:15,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:15,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:15,587 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:15,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:16,016 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:32:16,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:16,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:32:17,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:32:17,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:17,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:17,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:17,705 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:32:17,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:32:17,706 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:32:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:17,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:17,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:32:17,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578631440] [2021-04-15 02:32:17,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:32:17,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:17,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:32:17,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:17,742 INFO L87 Difference]: Start difference. First operand 1733 states and 5629 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:18,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:18,454 INFO L93 Difference]: Finished difference Result 1796 states and 5734 transitions. [2021-04-15 02:32:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:32:18,455 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:18,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:18,457 INFO L225 Difference]: With dead ends: 1796 [2021-04-15 02:32:18,457 INFO L226 Difference]: Without dead ends: 1786 [2021-04-15 02:32:18,457 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 871.4ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:32:18,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-04-15 02:32:18,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1733. [2021-04-15 02:32:18,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1733 states, 1732 states have (on average 3.25) internal successors, (5629), 1732 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 5629 transitions. [2021-04-15 02:32:18,475 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 5629 transitions. Word has length 19 [2021-04-15 02:32:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:18,475 INFO L480 AbstractCegarLoop]: Abstraction has 1733 states and 5629 transitions. [2021-04-15 02:32:18,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 5629 transitions. [2021-04-15 02:32:18,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:18,476 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:18,476 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:18,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14678 [2021-04-15 02:32:18,677 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:18,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:18,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1191710658, now seen corresponding path program 183 times [2021-04-15 02:32:18,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:18,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986793061] [2021-04-15 02:32:18,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:18,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986793061] [2021-04-15 02:32:18,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597070017] [2021-04-15 02:32:18,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:18,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:32:18,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:18,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:32:18,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:18,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:18,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:32:18,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036756470] [2021-04-15 02:32:18,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:32:18,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:18,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:32:18,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:32:18,802 INFO L87 Difference]: Start difference. First operand 1733 states and 5629 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:18,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:18,955 INFO L93 Difference]: Finished difference Result 2307 states and 7130 transitions. [2021-04-15 02:32:18,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:32:18,955 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:18,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:18,959 INFO L225 Difference]: With dead ends: 2307 [2021-04-15 02:32:18,959 INFO L226 Difference]: Without dead ends: 2307 [2021-04-15 02:32:18,959 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:32:18,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-04-15 02:32:18,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 1980. [2021-04-15 02:32:18,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.265790803436079) internal successors, (6463), 1979 states have internal predecessors, (6463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6463 transitions. [2021-04-15 02:32:18,982 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6463 transitions. Word has length 19 [2021-04-15 02:32:18,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:18,982 INFO L480 AbstractCegarLoop]: Abstraction has 1980 states and 6463 transitions. [2021-04-15 02:32:18,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:18,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6463 transitions. [2021-04-15 02:32:18,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:18,984 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:18,984 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:19,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15178,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:19,184 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:19,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:19,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1038408603, now seen corresponding path program 184 times [2021-04-15 02:32:19,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:19,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873963687] [2021-04-15 02:32:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:32:19,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873963687] [2021-04-15 02:32:19,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52178369] [2021-04-15 02:32:19,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:19,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:32:19,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:19,307 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:19,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:19,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:19,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:20,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:20,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:20,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:20,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:20,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:20,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-04-15 02:32:20,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881883573] [2021-04-15 02:32:20,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:32:20,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:20,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:32:20,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:32:20,035 INFO L87 Difference]: Start difference. First operand 1980 states and 6463 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:20,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:20,348 INFO L93 Difference]: Finished difference Result 2005 states and 6504 transitions. [2021-04-15 02:32:20,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:32:20,349 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:20,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:20,351 INFO L225 Difference]: With dead ends: 2005 [2021-04-15 02:32:20,351 INFO L226 Difference]: Without dead ends: 1992 [2021-04-15 02:32:20,351 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 318.5ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:20,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-04-15 02:32:20,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1980. [2021-04-15 02:32:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.2647801920161696) internal successors, (6461), 1979 states have internal predecessors, (6461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:20,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6461 transitions. [2021-04-15 02:32:20,372 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6461 transitions. Word has length 19 [2021-04-15 02:32:20,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:20,372 INFO L480 AbstractCegarLoop]: Abstraction has 1980 states and 6461 transitions. [2021-04-15 02:32:20,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:20,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6461 transitions. [2021-04-15 02:32:20,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:20,374 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:20,374 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:20,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15179,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:20,575 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:20,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:20,575 INFO L82 PathProgramCache]: Analyzing trace with hash -186075179, now seen corresponding path program 185 times [2021-04-15 02:32:20,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:20,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766364977] [2021-04-15 02:32:20,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:32:20,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766364977] [2021-04-15 02:32:20,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314940932] [2021-04-15 02:32:20,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:20,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:32:20,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:20,699 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:20,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:21,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:21,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:21,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:21,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:21,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:21,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:21,213 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:21,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:21,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-04-15 02:32:21,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258956554] [2021-04-15 02:32:21,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:32:21,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:21,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:32:21,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:32:21,213 INFO L87 Difference]: Start difference. First operand 1980 states and 6461 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:21,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:21,585 INFO L93 Difference]: Finished difference Result 2005 states and 6509 transitions. [2021-04-15 02:32:21,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:32:21,585 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:21,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:21,588 INFO L225 Difference]: With dead ends: 2005 [2021-04-15 02:32:21,588 INFO L226 Difference]: Without dead ends: 1996 [2021-04-15 02:32:21,588 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:32:21,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2021-04-15 02:32:21,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1982. [2021-04-15 02:32:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 3.264512872286724) internal successors, (6467), 1981 states have internal predecessors, (6467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:21,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 6467 transitions. [2021-04-15 02:32:21,610 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 6467 transitions. Word has length 19 [2021-04-15 02:32:21,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:21,610 INFO L480 AbstractCegarLoop]: Abstraction has 1982 states and 6467 transitions. [2021-04-15 02:32:21,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:21,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 6467 transitions. [2021-04-15 02:32:21,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:21,611 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:21,612 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:21,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15364,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:21,812 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:21,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:21,812 INFO L82 PathProgramCache]: Analyzing trace with hash 557508181, now seen corresponding path program 186 times [2021-04-15 02:32:21,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:21,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054399433] [2021-04-15 02:32:21,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:32:21,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054399433] [2021-04-15 02:32:21,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822597983] [2021-04-15 02:32:21,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:21,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:32:21,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:21,932 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:21,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:22,302 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:32:22,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:22,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:32:22,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:32:22,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:22,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:23,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:23,483 INFO L628 ElimStorePlain]: treesize reduction 23, result has 43.9 percent of original size [2021-04-15 02:32:23,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:32:23,484 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:32:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:23,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:23,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-04-15 02:32:23,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401995151] [2021-04-15 02:32:23,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:32:23,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:23,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:32:23,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:32:23,521 INFO L87 Difference]: Start difference. First operand 1982 states and 6467 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:23,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:23,994 INFO L93 Difference]: Finished difference Result 2031 states and 6557 transitions. [2021-04-15 02:32:23,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:32:23,994 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:23,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:23,996 INFO L225 Difference]: With dead ends: 2031 [2021-04-15 02:32:23,996 INFO L226 Difference]: Without dead ends: 2021 [2021-04-15 02:32:23,997 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 391.5ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:32:23,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2021-04-15 02:32:24,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1981. [2021-04-15 02:32:24,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 3.264646464646465) internal successors, (6464), 1980 states have internal predecessors, (6464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 6464 transitions. [2021-04-15 02:32:24,017 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 6464 transitions. Word has length 19 [2021-04-15 02:32:24,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:24,017 INFO L480 AbstractCegarLoop]: Abstraction has 1981 states and 6464 transitions. [2021-04-15 02:32:24,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:24,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 6464 transitions. [2021-04-15 02:32:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:24,018 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:24,019 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:24,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15459 [2021-04-15 02:32:24,219 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:24,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:24,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1900690751, now seen corresponding path program 187 times [2021-04-15 02:32:24,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:24,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48464403] [2021-04-15 02:32:24,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:24,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48464403] [2021-04-15 02:32:24,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418761922] [2021-04-15 02:32:24,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:24,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:24,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:24,751 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:32:24,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:24,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:32:26,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:32:27,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:27,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:27,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:27,355 INFO L628 ElimStorePlain]: treesize reduction 23, result has 43.9 percent of original size [2021-04-15 02:32:27,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:32:27,356 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:32:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:27,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:27,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:32:27,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575285061] [2021-04-15 02:32:27,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:32:27,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:27,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:32:27,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:32:27,390 INFO L87 Difference]: Start difference. First operand 1981 states and 6464 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:28,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:28,159 INFO L93 Difference]: Finished difference Result 2091 states and 6704 transitions. [2021-04-15 02:32:28,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:32:28,159 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:28,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:28,161 INFO L225 Difference]: With dead ends: 2091 [2021-04-15 02:32:28,161 INFO L226 Difference]: Without dead ends: 2073 [2021-04-15 02:32:28,161 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 751.7ms TimeCoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:32:28,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2021-04-15 02:32:28,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 1984. [2021-04-15 02:32:28,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 3.2612203731719616) internal successors, (6467), 1983 states have internal predecessors, (6467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:28,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 6467 transitions. [2021-04-15 02:32:28,182 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 6467 transitions. Word has length 19 [2021-04-15 02:32:28,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:28,182 INFO L480 AbstractCegarLoop]: Abstraction has 1984 states and 6467 transitions. [2021-04-15 02:32:28,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:28,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 6467 transitions. [2021-04-15 02:32:28,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:28,183 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:28,183 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:28,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15962 [2021-04-15 02:32:28,384 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:28,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:28,384 INFO L82 PathProgramCache]: Analyzing trace with hash -911141607, now seen corresponding path program 188 times [2021-04-15 02:32:28,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:28,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618703715] [2021-04-15 02:32:28,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:28,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618703715] [2021-04-15 02:32:28,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266389825] [2021-04-15 02:32:28,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:28,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:28,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:28,569 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:28,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:29,016 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:32:29,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:29,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:32:30,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-04-15 02:32:30,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:30,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:30,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:30,597 INFO L628 ElimStorePlain]: treesize reduction 31, result has 36.7 percent of original size [2021-04-15 02:32:30,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:32:30,597 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:32:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:30,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:30,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:32:30,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443508857] [2021-04-15 02:32:30,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:32:30,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:30,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:32:30,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:30,631 INFO L87 Difference]: Start difference. First operand 1984 states and 6467 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:31,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:31,436 INFO L93 Difference]: Finished difference Result 2141 states and 6846 transitions. [2021-04-15 02:32:31,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:32:31,436 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:31,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:31,439 INFO L225 Difference]: With dead ends: 2141 [2021-04-15 02:32:31,439 INFO L226 Difference]: Without dead ends: 2121 [2021-04-15 02:32:31,439 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 884.1ms TimeCoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:32:31,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2021-04-15 02:32:31,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1986. [2021-04-15 02:32:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 3.256926952141058) internal successors, (6465), 1985 states have internal predecessors, (6465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:31,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 6465 transitions. [2021-04-15 02:32:31,462 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 6465 transitions. Word has length 19 [2021-04-15 02:32:31,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:31,462 INFO L480 AbstractCegarLoop]: Abstraction has 1986 states and 6465 transitions. [2021-04-15 02:32:31,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:31,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 6465 transitions. [2021-04-15 02:32:31,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:31,464 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:31,464 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:31,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16827 [2021-04-15 02:32:31,664 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:31,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:31,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1963220779, now seen corresponding path program 189 times [2021-04-15 02:32:31,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:31,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792197634] [2021-04-15 02:32:31,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:31,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792197634] [2021-04-15 02:32:31,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957354404] [2021-04-15 02:32:31,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:31,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:32:31,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:31,806 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:31,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:32,225 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:32:32,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:32,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:32:32,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:32:32,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:32,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:32,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:32,941 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:32:32,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:32:32,942 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:32:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:32,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:32,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:32:32,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675028003] [2021-04-15 02:32:32,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:32:32,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:32,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:32:32,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:32,977 INFO L87 Difference]: Start difference. First operand 1986 states and 6465 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:33,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:33,790 INFO L93 Difference]: Finished difference Result 2047 states and 6565 transitions. [2021-04-15 02:32:33,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:32:33,790 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:33,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:33,792 INFO L225 Difference]: With dead ends: 2047 [2021-04-15 02:32:33,792 INFO L226 Difference]: Without dead ends: 2037 [2021-04-15 02:32:33,793 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 882.4ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:32:33,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2021-04-15 02:32:33,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1986. [2021-04-15 02:32:33,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 3.256926952141058) internal successors, (6465), 1985 states have internal predecessors, (6465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 6465 transitions. [2021-04-15 02:32:33,813 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 6465 transitions. Word has length 19 [2021-04-15 02:32:33,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:33,813 INFO L480 AbstractCegarLoop]: Abstraction has 1986 states and 6465 transitions. [2021-04-15 02:32:33,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:33,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 6465 transitions. [2021-04-15 02:32:33,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:33,815 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:33,815 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:34,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17343 [2021-04-15 02:32:34,015 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:34,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:34,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1999747909, now seen corresponding path program 190 times [2021-04-15 02:32:34,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:34,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406550327] [2021-04-15 02:32:34,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:34,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406550327] [2021-04-15 02:32:34,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326455712] [2021-04-15 02:32:34,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:34,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:32:34,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:34,184 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:34,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:34,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:34,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:34,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:34,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:34,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:34,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:34,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:34,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:32:34,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201242121] [2021-04-15 02:32:34,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:32:34,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:34,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:32:34,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:34,904 INFO L87 Difference]: Start difference. First operand 1986 states and 6465 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:35,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:35,449 INFO L93 Difference]: Finished difference Result 2017 states and 6523 transitions. [2021-04-15 02:32:35,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:32:35,449 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:35,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:35,452 INFO L225 Difference]: With dead ends: 2017 [2021-04-15 02:32:35,452 INFO L226 Difference]: Without dead ends: 2006 [2021-04-15 02:32:35,452 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 493.1ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:32:35,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-04-15 02:32:35,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1986. [2021-04-15 02:32:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 3.2534005037783373) internal successors, (6458), 1985 states have internal predecessors, (6458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:35,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 6458 transitions. [2021-04-15 02:32:35,473 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 6458 transitions. Word has length 19 [2021-04-15 02:32:35,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:35,473 INFO L480 AbstractCegarLoop]: Abstraction has 1986 states and 6458 transitions. [2021-04-15 02:32:35,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 6458 transitions. [2021-04-15 02:32:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:35,475 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:35,475 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:35,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17615,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:35,675 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:35,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1256164549, now seen corresponding path program 191 times [2021-04-15 02:32:35,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:35,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673082623] [2021-04-15 02:32:35,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:35,792 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:35,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673082623] [2021-04-15 02:32:35,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449082103] [2021-04-15 02:32:35,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:35,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:32:35,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:35,812 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:35,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:36,176 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:32:36,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:36,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:32:36,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:32:37,098 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-04-15 02:32:37,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:37,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:37,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:37,751 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:32:37,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:32:37,752 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:32:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:37,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:37,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:32:37,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160776239] [2021-04-15 02:32:37,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:32:37,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:37,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:32:37,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:32:37,790 INFO L87 Difference]: Start difference. First operand 1986 states and 6458 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:38,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:38,596 INFO L93 Difference]: Finished difference Result 2113 states and 6763 transitions. [2021-04-15 02:32:38,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:32:38,596 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:38,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:38,599 INFO L225 Difference]: With dead ends: 2113 [2021-04-15 02:32:38,599 INFO L226 Difference]: Without dead ends: 2103 [2021-04-15 02:32:38,599 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 582.5ms TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:32:38,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2021-04-15 02:32:38,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1986. [2021-04-15 02:32:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 3.2534005037783373) internal successors, (6458), 1985 states have internal predecessors, (6458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 6458 transitions. [2021-04-15 02:32:38,620 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 6458 transitions. Word has length 19 [2021-04-15 02:32:38,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:38,620 INFO L480 AbstractCegarLoop]: Abstraction has 1986 states and 6458 transitions. [2021-04-15 02:32:38,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:38,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 6458 transitions. [2021-04-15 02:32:38,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:38,621 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:38,621 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:38,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17768,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:38,822 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:38,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:38,822 INFO L82 PathProgramCache]: Analyzing trace with hash -405020417, now seen corresponding path program 192 times [2021-04-15 02:32:38,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:38,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161987670] [2021-04-15 02:32:38,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:38,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161987670] [2021-04-15 02:32:38,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821807745] [2021-04-15 02:32:38,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:38,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:32:38,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:38,992 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:38,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:39,468 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:32:39,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:39,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:32:42,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:32:42,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:42,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:42,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:42,702 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:32:42,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:32:42,702 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:32:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:42,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:42,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:32:42,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143311307] [2021-04-15 02:32:42,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:32:42,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:42,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:32:42,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:32:42,736 INFO L87 Difference]: Start difference. First operand 1986 states and 6458 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:43,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:43,914 INFO L93 Difference]: Finished difference Result 2223 states and 7047 transitions. [2021-04-15 02:32:43,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 02:32:43,915 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:43,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:43,917 INFO L225 Difference]: With dead ends: 2223 [2021-04-15 02:32:43,917 INFO L226 Difference]: Without dead ends: 2211 [2021-04-15 02:32:43,918 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 835.1ms TimeCoverageRelationStatistics Valid=214, Invalid=1678, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 02:32:43,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-04-15 02:32:43,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2007. [2021-04-15 02:32:43,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 2006 states have (on average 3.255234297108674) internal successors, (6530), 2006 states have internal predecessors, (6530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:43,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 6530 transitions. [2021-04-15 02:32:43,941 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 6530 transitions. Word has length 19 [2021-04-15 02:32:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:43,941 INFO L480 AbstractCegarLoop]: Abstraction has 2007 states and 6530 transitions. [2021-04-15 02:32:43,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:43,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 6530 transitions. [2021-04-15 02:32:43,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:43,943 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:43,943 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:44,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18277 [2021-04-15 02:32:44,144 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:44,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:44,144 INFO L82 PathProgramCache]: Analyzing trace with hash 210643899, now seen corresponding path program 193 times [2021-04-15 02:32:44,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:44,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158541215] [2021-04-15 02:32:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:44,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158541215] [2021-04-15 02:32:44,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058250290] [2021-04-15 02:32:44,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:44,333 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:44,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:44,739 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:32:44,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:44,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:32:45,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:32:45,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:45,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:45,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:45,555 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:32:45,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:32:45,556 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:32:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:45,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:45,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:32:45,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723683496] [2021-04-15 02:32:45,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:32:45,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:45,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:32:45,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:32:45,594 INFO L87 Difference]: Start difference. First operand 2007 states and 6530 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:46,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:46,811 INFO L93 Difference]: Finished difference Result 2310 states and 7299 transitions. [2021-04-15 02:32:46,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 02:32:46,811 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:46,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:46,814 INFO L225 Difference]: With dead ends: 2310 [2021-04-15 02:32:46,814 INFO L226 Difference]: Without dead ends: 2298 [2021-04-15 02:32:46,815 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 994.6ms TimeCoverageRelationStatistics Valid=302, Invalid=2050, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 02:32:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-04-15 02:32:46,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2004. [2021-04-15 02:32:46,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.251123315027459) internal successors, (6512), 2003 states have internal predecessors, (6512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:46,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 6512 transitions. [2021-04-15 02:32:46,838 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 6512 transitions. Word has length 19 [2021-04-15 02:32:46,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:46,838 INFO L480 AbstractCegarLoop]: Abstraction has 2004 states and 6512 transitions. [2021-04-15 02:32:46,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:46,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 6512 transitions. [2021-04-15 02:32:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:46,840 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:46,840 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:47,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19246 [2021-04-15 02:32:47,040 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:47,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:47,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2116368511, now seen corresponding path program 194 times [2021-04-15 02:32:47,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:47,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581361901] [2021-04-15 02:32:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:47,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581361901] [2021-04-15 02:32:47,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217592437] [2021-04-15 02:32:47,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:47,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:47,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:47,190 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:47,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:47,597 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:32:47,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:47,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:32:48,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:32:48,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:48,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:48,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:48,552 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:32:48,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:32:48,553 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:32:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:48,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:48,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:32:48,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397110614] [2021-04-15 02:32:48,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:32:48,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:48,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:32:48,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:32:48,590 INFO L87 Difference]: Start difference. First operand 2004 states and 6512 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:49,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:49,916 INFO L93 Difference]: Finished difference Result 2336 states and 7411 transitions. [2021-04-15 02:32:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:32:49,916 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:49,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:49,919 INFO L225 Difference]: With dead ends: 2336 [2021-04-15 02:32:49,919 INFO L226 Difference]: Without dead ends: 2322 [2021-04-15 02:32:49,920 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1061.2ms TimeCoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 02:32:49,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-04-15 02:32:49,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 1953. [2021-04-15 02:32:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 3.2223360655737703) internal successors, (6290), 1952 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:49,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 6290 transitions. [2021-04-15 02:32:49,942 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 6290 transitions. Word has length 19 [2021-04-15 02:32:49,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:49,943 INFO L480 AbstractCegarLoop]: Abstraction has 1953 states and 6290 transitions. [2021-04-15 02:32:49,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:49,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 6290 transitions. [2021-04-15 02:32:49,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:49,944 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:49,944 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:50,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19599 [2021-04-15 02:32:50,145 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:50,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:50,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1705678872, now seen corresponding path program 195 times [2021-04-15 02:32:50,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:50,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504741444] [2021-04-15 02:32:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:50,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504741444] [2021-04-15 02:32:50,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635880355] [2021-04-15 02:32:50,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:50,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:32:50,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:50,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:32:50,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:50,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:50,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:32:50,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032025361] [2021-04-15 02:32:50,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:32:50,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:50,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:32:50,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:32:50,281 INFO L87 Difference]: Start difference. First operand 1953 states and 6290 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:50,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:50,395 INFO L93 Difference]: Finished difference Result 2261 states and 6840 transitions. [2021-04-15 02:32:50,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:32:50,396 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:50,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:50,399 INFO L225 Difference]: With dead ends: 2261 [2021-04-15 02:32:50,399 INFO L226 Difference]: Without dead ends: 2261 [2021-04-15 02:32:50,399 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:32:50,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-04-15 02:32:50,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1192. [2021-04-15 02:32:50,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 3.1469353484466835) internal successors, (3748), 1191 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:50,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 3748 transitions. [2021-04-15 02:32:50,415 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 3748 transitions. Word has length 19 [2021-04-15 02:32:50,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:50,415 INFO L480 AbstractCegarLoop]: Abstraction has 1192 states and 3748 transitions. [2021-04-15 02:32:50,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:50,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 3748 transitions. [2021-04-15 02:32:50,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:50,416 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:50,416 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:50,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19984 [2021-04-15 02:32:50,617 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:50,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:50,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1064289339, now seen corresponding path program 196 times [2021-04-15 02:32:50,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:50,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270350111] [2021-04-15 02:32:50,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:50,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270350111] [2021-04-15 02:32:50,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964917818] [2021-04-15 02:32:50,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:50,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:32:50,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:50,786 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:50,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:51,210 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:32:51,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:51,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:32:51,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:32:52,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:52,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:52,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:52,294 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:32:52,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:32:52,295 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:32:52,335 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:52,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:52,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:32:52,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627823155] [2021-04-15 02:32:52,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:32:52,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:52,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:32:52,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:32:52,335 INFO L87 Difference]: Start difference. First operand 1192 states and 3748 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:53,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:53,303 INFO L93 Difference]: Finished difference Result 1282 states and 3906 transitions. [2021-04-15 02:32:53,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:32:53,304 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:53,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:53,305 INFO L225 Difference]: With dead ends: 1282 [2021-04-15 02:32:53,305 INFO L226 Difference]: Without dead ends: 1272 [2021-04-15 02:32:53,305 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1006.9ms TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:32:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-04-15 02:32:53,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1192. [2021-04-15 02:32:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 3.1469353484466835) internal successors, (3748), 1191 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:53,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 3748 transitions. [2021-04-15 02:32:53,316 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 3748 transitions. Word has length 19 [2021-04-15 02:32:53,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:53,316 INFO L480 AbstractCegarLoop]: Abstraction has 1192 states and 3748 transitions. [2021-04-15 02:32:53,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:53,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 3748 transitions. [2021-04-15 02:32:53,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:53,317 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:53,317 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:53,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19985,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:53,518 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:53,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:53,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1199332606, now seen corresponding path program 197 times [2021-04-15 02:32:53,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:53,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691908725] [2021-04-15 02:32:53,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:53,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691908725] [2021-04-15 02:32:53,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13640471] [2021-04-15 02:32:53,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:53,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:32:53,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:53,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:32:53,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:53,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:53,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:32:53,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412123951] [2021-04-15 02:32:53,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:32:53,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:53,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:32:53,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:32:53,643 INFO L87 Difference]: Start difference. First operand 1192 states and 3748 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:53,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:53,794 INFO L93 Difference]: Finished difference Result 1823 states and 5469 transitions. [2021-04-15 02:32:53,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:32:53,795 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:53,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:53,797 INFO L225 Difference]: With dead ends: 1823 [2021-04-15 02:32:53,797 INFO L226 Difference]: Without dead ends: 1823 [2021-04-15 02:32:53,797 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:32:53,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-04-15 02:32:53,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1427. [2021-04-15 02:32:53,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1426 states have (on average 3.1690042075736327) internal successors, (4519), 1426 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 4519 transitions. [2021-04-15 02:32:53,812 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 4519 transitions. Word has length 19 [2021-04-15 02:32:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:53,812 INFO L480 AbstractCegarLoop]: Abstraction has 1427 states and 4519 transitions. [2021-04-15 02:32:53,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:53,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 4519 transitions. [2021-04-15 02:32:53,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:53,814 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:53,814 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:54,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20413 [2021-04-15 02:32:54,014 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:54,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:54,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1485393921, now seen corresponding path program 198 times [2021-04-15 02:32:54,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:54,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053705803] [2021-04-15 02:32:54,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:54,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053705803] [2021-04-15 02:32:54,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927166238] [2021-04-15 02:32:54,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:54,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:32:54,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:54,182 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:54,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:54,666 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:32:54,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:54,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:32:55,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:32:55,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:55,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:56,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:56,448 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:32:56,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:32:56,449 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:32:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:56,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:56,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:32:56,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126435397] [2021-04-15 02:32:56,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:32:56,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:56,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:32:56,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:32:56,484 INFO L87 Difference]: Start difference. First operand 1427 states and 4519 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:57,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:57,421 INFO L93 Difference]: Finished difference Result 1494 states and 4632 transitions. [2021-04-15 02:32:57,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:32:57,421 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:57,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:57,424 INFO L225 Difference]: With dead ends: 1494 [2021-04-15 02:32:57,424 INFO L226 Difference]: Without dead ends: 1484 [2021-04-15 02:32:57,424 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1089.1ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:32:57,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2021-04-15 02:32:57,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1427. [2021-04-15 02:32:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1426 states have (on average 3.1690042075736327) internal successors, (4519), 1426 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:57,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 4519 transitions. [2021-04-15 02:32:57,446 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 4519 transitions. Word has length 19 [2021-04-15 02:32:57,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:57,446 INFO L480 AbstractCegarLoop]: Abstraction has 1427 states and 4519 transitions. [2021-04-15 02:32:57,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:57,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 4519 transitions. [2021-04-15 02:32:57,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:57,448 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:57,448 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:57,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20414 [2021-04-15 02:32:57,670 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:57,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:57,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1612499752, now seen corresponding path program 199 times [2021-04-15 02:32:57,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:57,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118654459] [2021-04-15 02:32:57,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:57,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118654459] [2021-04-15 02:32:57,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40537994] [2021-04-15 02:32:57,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:57,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:32:57,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:57,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:57,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:32:57,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898859915] [2021-04-15 02:32:57,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:32:57,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:57,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:32:57,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:32:57,786 INFO L87 Difference]: Start difference. First operand 1427 states and 4519 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:57,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:57,992 INFO L93 Difference]: Finished difference Result 1911 states and 5736 transitions. [2021-04-15 02:32:57,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:32:57,992 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:57,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:57,995 INFO L225 Difference]: With dead ends: 1911 [2021-04-15 02:32:57,995 INFO L226 Difference]: Without dead ends: 1911 [2021-04-15 02:32:57,995 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:32:57,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2021-04-15 02:32:58,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1581. [2021-04-15 02:32:58,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 3.1759493670886076) internal successors, (5018), 1580 states have internal predecessors, (5018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 5018 transitions. [2021-04-15 02:32:58,014 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 5018 transitions. Word has length 19 [2021-04-15 02:32:58,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:58,014 INFO L480 AbstractCegarLoop]: Abstraction has 1581 states and 5018 transitions. [2021-04-15 02:32:58,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:58,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 5018 transitions. [2021-04-15 02:32:58,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:58,015 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:58,015 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:58,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21151,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:58,216 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:58,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:58,216 INFO L82 PathProgramCache]: Analyzing trace with hash 705955403, now seen corresponding path program 200 times [2021-04-15 02:32:58,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:58,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296424817] [2021-04-15 02:32:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:58,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296424817] [2021-04-15 02:32:58,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564563467] [2021-04-15 02:32:58,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:58,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:58,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:58,353 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:58,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:58,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:58,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:32:59,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:32:59,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:32:59,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:32:59,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:32:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:59,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:59,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:32:59,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954571137] [2021-04-15 02:32:59,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:32:59,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:59,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:32:59,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:32:59,077 INFO L87 Difference]: Start difference. First operand 1581 states and 5018 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:59,428 INFO L93 Difference]: Finished difference Result 1605 states and 5056 transitions. [2021-04-15 02:32:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:32:59,429 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:32:59,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:59,430 INFO L225 Difference]: With dead ends: 1605 [2021-04-15 02:32:59,430 INFO L226 Difference]: Without dead ends: 1592 [2021-04-15 02:32:59,431 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 404.3ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:32:59,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-04-15 02:32:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1581. [2021-04-15 02:32:59,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 3.1746835443037975) internal successors, (5016), 1580 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:59,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 5016 transitions. [2021-04-15 02:32:59,445 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 5016 transitions. Word has length 19 [2021-04-15 02:32:59,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:59,445 INFO L480 AbstractCegarLoop]: Abstraction has 1581 states and 5016 transitions. [2021-04-15 02:32:59,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:59,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 5016 transitions. [2021-04-15 02:32:59,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:32:59,447 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:59,447 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:59,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21152 [2021-04-15 02:32:59,647 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:59,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:59,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1558288827, now seen corresponding path program 201 times [2021-04-15 02:32:59,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:59,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269585538] [2021-04-15 02:32:59,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:59,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269585538] [2021-04-15 02:32:59,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353224072] [2021-04-15 02:32:59,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:59,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:32:59,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:59,786 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:32:59,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:00,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:00,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:33:00,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:00,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:00,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:33:00,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:33:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:00,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:00,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:33:00,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508783563] [2021-04-15 02:33:00,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:33:00,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:00,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:33:00,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:33:00,606 INFO L87 Difference]: Start difference. First operand 1581 states and 5016 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:01,148 INFO L93 Difference]: Finished difference Result 1606 states and 5064 transitions. [2021-04-15 02:33:01,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:33:01,149 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:01,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:01,151 INFO L225 Difference]: With dead ends: 1606 [2021-04-15 02:33:01,151 INFO L226 Difference]: Without dead ends: 1597 [2021-04-15 02:33:01,151 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 426.7ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:33:01,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-04-15 02:33:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1583. [2021-04-15 02:33:01,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.1744627054361567) internal successors, (5022), 1582 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:01,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5022 transitions. [2021-04-15 02:33:01,167 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5022 transitions. Word has length 19 [2021-04-15 02:33:01,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:01,167 INFO L480 AbstractCegarLoop]: Abstraction has 1583 states and 5022 transitions. [2021-04-15 02:33:01,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:01,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5022 transitions. [2021-04-15 02:33:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:01,169 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:01,169 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:01,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21323 [2021-04-15 02:33:01,369 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:01,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:01,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1993095109, now seen corresponding path program 202 times [2021-04-15 02:33:01,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:01,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185185597] [2021-04-15 02:33:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:01,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185185597] [2021-04-15 02:33:01,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725092875] [2021-04-15 02:33:01,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:01,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:01,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:01,505 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:33:01,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:01,869 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:33:01,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:01,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:33:03,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:33:04,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:04,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:33:04,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:04,366 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:33:04,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:33:04,367 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:33:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:04,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:04,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:33:04,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013908014] [2021-04-15 02:33:04,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:33:04,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:04,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:33:04,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:33:04,406 INFO L87 Difference]: Start difference. First operand 1583 states and 5022 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:05,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:05,040 INFO L93 Difference]: Finished difference Result 1653 states and 5173 transitions. [2021-04-15 02:33:05,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:33:05,041 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:05,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:05,043 INFO L225 Difference]: With dead ends: 1653 [2021-04-15 02:33:05,043 INFO L226 Difference]: Without dead ends: 1643 [2021-04-15 02:33:05,043 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 439.1ms TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:33:05,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-04-15 02:33:05,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1582. [2021-04-15 02:33:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.174573055028463) internal successors, (5019), 1581 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:05,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5019 transitions. [2021-04-15 02:33:05,060 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5019 transitions. Word has length 19 [2021-04-15 02:33:05,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:05,060 INFO L480 AbstractCegarLoop]: Abstraction has 1582 states and 5019 transitions. [2021-04-15 02:33:05,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:05,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5019 transitions. [2021-04-15 02:33:05,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:05,061 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:05,061 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:05,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21526,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:05,262 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:05,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:05,262 INFO L82 PathProgramCache]: Analyzing trace with hash -218856773, now seen corresponding path program 203 times [2021-04-15 02:33:05,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:05,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699785838] [2021-04-15 02:33:05,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:05,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699785838] [2021-04-15 02:33:05,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532150347] [2021-04-15 02:33:05,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:05,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:33:05,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:05,397 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:33:05,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:05,816 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:33:05,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:05,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:33:06,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:33:06,572 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-04-15 02:33:06,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:06,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:33:06,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:06,780 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:33:06,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:33:06,781 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:33:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:06,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:06,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:33:06,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752196800] [2021-04-15 02:33:06,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:33:06,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:06,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:33:06,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:33:06,818 INFO L87 Difference]: Start difference. First operand 1582 states and 5019 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:07,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:07,622 INFO L93 Difference]: Finished difference Result 1688 states and 5263 transitions. [2021-04-15 02:33:07,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:33:07,623 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:07,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:07,625 INFO L225 Difference]: With dead ends: 1688 [2021-04-15 02:33:07,625 INFO L226 Difference]: Without dead ends: 1678 [2021-04-15 02:33:07,625 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 911.7ms TimeCoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:33:07,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2021-04-15 02:33:07,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1582. [2021-04-15 02:33:07,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.174573055028463) internal successors, (5019), 1581 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:07,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5019 transitions. [2021-04-15 02:33:07,640 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5019 transitions. Word has length 19 [2021-04-15 02:33:07,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:07,640 INFO L480 AbstractCegarLoop]: Abstraction has 1582 states and 5019 transitions. [2021-04-15 02:33:07,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:07,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5019 transitions. [2021-04-15 02:33:07,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:07,641 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:07,642 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:07,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22352,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:07,842 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:07,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:07,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1486313951, now seen corresponding path program 204 times [2021-04-15 02:33:07,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:07,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244939809] [2021-04-15 02:33:07,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:07,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244939809] [2021-04-15 02:33:07,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979542906] [2021-04-15 02:33:07,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:07,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:33:07,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:07,993 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:33:07,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:08,419 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:33:08,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:08,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:33:09,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:33:10,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:10,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:33:10,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:10,197 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:33:10,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:33:10,197 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:33:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:10,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:10,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:33:10,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093292471] [2021-04-15 02:33:10,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:33:10,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:10,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:33:10,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:33:10,232 INFO L87 Difference]: Start difference. First operand 1582 states and 5019 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:11,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:11,231 INFO L93 Difference]: Finished difference Result 1757 states and 5460 transitions. [2021-04-15 02:33:11,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:33:11,232 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:11,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:11,233 INFO L225 Difference]: With dead ends: 1757 [2021-04-15 02:33:11,233 INFO L226 Difference]: Without dead ends: 1747 [2021-04-15 02:33:11,234 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1021.7ms TimeCoverageRelationStatistics Valid=283, Invalid=1697, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 02:33:11,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-04-15 02:33:11,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1582. [2021-04-15 02:33:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.174573055028463) internal successors, (5019), 1581 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:11,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5019 transitions. [2021-04-15 02:33:11,249 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5019 transitions. Word has length 19 [2021-04-15 02:33:11,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:11,249 INFO L480 AbstractCegarLoop]: Abstraction has 1582 states and 5019 transitions. [2021-04-15 02:33:11,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:11,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5019 transitions. [2021-04-15 02:33:11,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:11,250 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:11,251 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:11,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22699,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:11,451 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:11,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:11,451 INFO L82 PathProgramCache]: Analyzing trace with hash 258970085, now seen corresponding path program 205 times [2021-04-15 02:33:11,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:11,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047385846] [2021-04-15 02:33:11,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:11,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047385846] [2021-04-15 02:33:11,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186418019] [2021-04-15 02:33:11,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:11,614 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:33:11,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:12,060 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:33:12,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:12,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:33:14,313 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1681 DAG size of output: 880 [2021-04-15 02:33:14,520 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1688 DAG size of output: 887 [2021-04-15 02:33:15,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:33:15,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:15,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:33:15,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:15,915 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:33:15,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:33:15,916 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:33:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:15,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:15,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:33:15,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271257422] [2021-04-15 02:33:15,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:33:15,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:15,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:33:15,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:33:15,952 INFO L87 Difference]: Start difference. First operand 1582 states and 5019 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:17,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:17,058 INFO L93 Difference]: Finished difference Result 1655 states and 5150 transitions. [2021-04-15 02:33:17,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:33:17,059 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:17,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:17,060 INFO L225 Difference]: With dead ends: 1655 [2021-04-15 02:33:17,060 INFO L226 Difference]: Without dead ends: 1645 [2021-04-15 02:33:17,061 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1126.0ms TimeCoverageRelationStatistics Valid=294, Invalid=1686, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 02:33:17,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2021-04-15 02:33:17,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1582. [2021-04-15 02:33:17,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.174573055028463) internal successors, (5019), 1581 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:17,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5019 transitions. [2021-04-15 02:33:17,076 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5019 transitions. Word has length 19 [2021-04-15 02:33:17,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:17,077 INFO L480 AbstractCegarLoop]: Abstraction has 1582 states and 5019 transitions. [2021-04-15 02:33:17,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:17,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5019 transitions. [2021-04-15 02:33:17,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:17,078 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:17,078 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:17,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23336 [2021-04-15 02:33:17,278 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:17,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:17,279 INFO L82 PathProgramCache]: Analyzing trace with hash -891850757, now seen corresponding path program 206 times [2021-04-15 02:33:17,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:17,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840270121] [2021-04-15 02:33:17,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:17,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840270121] [2021-04-15 02:33:17,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733938809] [2021-04-15 02:33:17,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:17,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:17,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:17,448 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:33:17,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:17,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:17,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:33:18,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:18,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:18,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:33:18,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:33:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:18,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:18,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:33:18,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790804363] [2021-04-15 02:33:18,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:33:18,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:18,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:33:18,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:33:18,202 INFO L87 Difference]: Start difference. First operand 1582 states and 5019 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:18,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:18,651 INFO L93 Difference]: Finished difference Result 1609 states and 5071 transitions. [2021-04-15 02:33:18,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:33:18,651 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:18,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:18,653 INFO L225 Difference]: With dead ends: 1609 [2021-04-15 02:33:18,653 INFO L226 Difference]: Without dead ends: 1600 [2021-04-15 02:33:18,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 489.2ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:33:18,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-04-15 02:33:18,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1582. [2021-04-15 02:33:18,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.173940543959519) internal successors, (5018), 1581 states have internal predecessors, (5018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:18,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5018 transitions. [2021-04-15 02:33:18,671 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5018 transitions. Word has length 19 [2021-04-15 02:33:18,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:18,672 INFO L480 AbstractCegarLoop]: Abstraction has 1582 states and 5018 transitions. [2021-04-15 02:33:18,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:18,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5018 transitions. [2021-04-15 02:33:18,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:18,673 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:18,673 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:18,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24370,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:18,873 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:18,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:18,874 INFO L82 PathProgramCache]: Analyzing trace with hash -148267397, now seen corresponding path program 207 times [2021-04-15 02:33:18,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:18,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629079568] [2021-04-15 02:33:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:18,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629079568] [2021-04-15 02:33:18,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625540644] [2021-04-15 02:33:18,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:19,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:33:19,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:19,013 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:33:19,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:19,380 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:33:19,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:19,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:33:20,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:33:20,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:20,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:33:20,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:20,648 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:33:20,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:33:20,649 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:33:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:20,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:20,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:33:20,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704114739] [2021-04-15 02:33:20,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:33:20,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:20,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:33:20,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:33:20,684 INFO L87 Difference]: Start difference. First operand 1582 states and 5018 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:21,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:21,577 INFO L93 Difference]: Finished difference Result 1701 states and 5300 transitions. [2021-04-15 02:33:21,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:33:21,578 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:21,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:21,580 INFO L225 Difference]: With dead ends: 1701 [2021-04-15 02:33:21,580 INFO L226 Difference]: Without dead ends: 1691 [2021-04-15 02:33:21,580 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 663.9ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:33:21,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2021-04-15 02:33:21,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1582. [2021-04-15 02:33:21,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.173940543959519) internal successors, (5018), 1581 states have internal predecessors, (5018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:21,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5018 transitions. [2021-04-15 02:33:21,596 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5018 transitions. Word has length 19 [2021-04-15 02:33:21,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:21,596 INFO L480 AbstractCegarLoop]: Abstraction has 1582 states and 5018 transitions. [2021-04-15 02:33:21,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:21,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5018 transitions. [2021-04-15 02:33:21,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:21,597 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:21,597 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:21,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24546 [2021-04-15 02:33:21,798 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:21,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:21,798 INFO L82 PathProgramCache]: Analyzing trace with hash 702876735, now seen corresponding path program 208 times [2021-04-15 02:33:21,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:21,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710468256] [2021-04-15 02:33:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:21,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710468256] [2021-04-15 02:33:21,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477732464] [2021-04-15 02:33:21,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:21,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:21,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:21,937 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:33:21,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:22,319 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:33:22,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:22,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:33:23,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:33:23,131 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-04-15 02:33:23,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:23,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:33:23,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:23,414 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:33:23,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:33:23,415 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:33:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:23,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:23,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:33:23,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921460783] [2021-04-15 02:33:23,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:33:23,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:23,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:33:23,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:33:23,454 INFO L87 Difference]: Start difference. First operand 1582 states and 5018 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:24,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:24,616 INFO L93 Difference]: Finished difference Result 1802 states and 5550 transitions. [2021-04-15 02:33:24,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 02:33:24,617 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:24,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:24,619 INFO L225 Difference]: With dead ends: 1802 [2021-04-15 02:33:24,619 INFO L226 Difference]: Without dead ends: 1792 [2021-04-15 02:33:24,619 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 859.2ms TimeCoverageRelationStatistics Valid=240, Invalid=1922, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 02:33:24,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-04-15 02:33:24,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1562. [2021-04-15 02:33:24,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 3.1729660474055095) internal successors, (4953), 1561 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4953 transitions. [2021-04-15 02:33:24,637 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4953 transitions. Word has length 19 [2021-04-15 02:33:24,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:24,637 INFO L480 AbstractCegarLoop]: Abstraction has 1562 states and 4953 transitions. [2021-04-15 02:33:24,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:24,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4953 transitions. [2021-04-15 02:33:24,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:24,639 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:24,639 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:24,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25043 [2021-04-15 02:33:24,839 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:24,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:24,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1318541051, now seen corresponding path program 209 times [2021-04-15 02:33:24,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:24,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672740621] [2021-04-15 02:33:24,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:24,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672740621] [2021-04-15 02:33:24,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622138514] [2021-04-15 02:33:24,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:24,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:33:24,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:24,988 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:33:24,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:25,398 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:33:25,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:25,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:33:26,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:33:26,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:26,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:33:26,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:26,512 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:33:26,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:33:26,513 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:33:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:26,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:26,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:33:26,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422191712] [2021-04-15 02:33:26,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:33:26,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:26,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:33:26,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:33:26,553 INFO L87 Difference]: Start difference. First operand 1562 states and 4953 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:27,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:27,938 INFO L93 Difference]: Finished difference Result 1858 states and 5660 transitions. [2021-04-15 02:33:27,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 02:33:27,938 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:27,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:27,940 INFO L225 Difference]: With dead ends: 1858 [2021-04-15 02:33:27,940 INFO L226 Difference]: Without dead ends: 1846 [2021-04-15 02:33:27,941 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1114.1ms TimeCoverageRelationStatistics Valid=348, Invalid=2408, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 02:33:27,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-04-15 02:33:27,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1580. [2021-04-15 02:33:27,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.175427485750475) internal successors, (5014), 1579 states have internal predecessors, (5014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:27,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5014 transitions. [2021-04-15 02:33:27,957 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5014 transitions. Word has length 19 [2021-04-15 02:33:27,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:27,957 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5014 transitions. [2021-04-15 02:33:27,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:27,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5014 transitions. [2021-04-15 02:33:27,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:27,958 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:27,958 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:28,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25449,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:28,159 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:28,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:28,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1070701633, now seen corresponding path program 210 times [2021-04-15 02:33:28,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:28,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222097898] [2021-04-15 02:33:28,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:28,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222097898] [2021-04-15 02:33:28,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111526808] [2021-04-15 02:33:28,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:28,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:33:28,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:28,308 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:33:28,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:28,752 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:33:28,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:28,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:33:30,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:33:31,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:31,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:33:31,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:31,347 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:33:31,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:33:31,348 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:33:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:31,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:31,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:33:31,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573827461] [2021-04-15 02:33:31,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:33:31,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:31,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:33:31,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:33:31,383 INFO L87 Difference]: Start difference. First operand 1580 states and 5014 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:32,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:32,534 INFO L93 Difference]: Finished difference Result 1727 states and 5323 transitions. [2021-04-15 02:33:32,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 02:33:32,534 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:32,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:32,536 INFO L225 Difference]: With dead ends: 1727 [2021-04-15 02:33:32,536 INFO L226 Difference]: Without dead ends: 1715 [2021-04-15 02:33:32,536 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1172.5ms TimeCoverageRelationStatistics Valid=356, Invalid=2094, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 02:33:32,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-04-15 02:33:32,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1582. [2021-04-15 02:33:32,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.170777988614801) internal successors, (5013), 1581 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:32,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5013 transitions. [2021-04-15 02:33:32,554 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5013 transitions. Word has length 19 [2021-04-15 02:33:32,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:32,554 INFO L480 AbstractCegarLoop]: Abstraction has 1582 states and 5013 transitions. [2021-04-15 02:33:32,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5013 transitions. [2021-04-15 02:33:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:32,555 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:32,556 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:32,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25854 [2021-04-15 02:33:32,756 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:32,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:32,756 INFO L82 PathProgramCache]: Analyzing trace with hash -2122780805, now seen corresponding path program 211 times [2021-04-15 02:33:32,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:32,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964381443] [2021-04-15 02:33:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:32,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964381443] [2021-04-15 02:33:32,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234868541] [2021-04-15 02:33:32,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:32,924 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:33:32,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:33,360 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:33:33,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:33,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:33:33,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:33:34,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:34,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:33:34,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:34,626 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:33:34,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:33:34,627 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:33:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:34,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:34,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:33:34,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991321003] [2021-04-15 02:33:34,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:33:34,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:34,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:33:34,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:33:34,662 INFO L87 Difference]: Start difference. First operand 1582 states and 5013 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:35,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:35,739 INFO L93 Difference]: Finished difference Result 1736 states and 5354 transitions. [2021-04-15 02:33:35,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:33:35,740 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:35,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:35,742 INFO L225 Difference]: With dead ends: 1736 [2021-04-15 02:33:35,742 INFO L226 Difference]: Without dead ends: 1726 [2021-04-15 02:33:35,742 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1122.7ms TimeCoverageRelationStatistics Valid=295, Invalid=1685, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 02:33:35,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2021-04-15 02:33:35,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1580. [2021-04-15 02:33:35,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.1728942368587716) internal successors, (5010), 1579 states have internal predecessors, (5010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5010 transitions. [2021-04-15 02:33:35,758 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5010 transitions. Word has length 19 [2021-04-15 02:33:35,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:35,758 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5010 transitions. [2021-04-15 02:33:35,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:35,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5010 transitions. [2021-04-15 02:33:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:35,759 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:35,759 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:35,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26659 [2021-04-15 02:33:35,959 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:35,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:35,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1987737538, now seen corresponding path program 212 times [2021-04-15 02:33:35,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:35,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197168477] [2021-04-15 02:33:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:36,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197168477] [2021-04-15 02:33:36,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927710044] [2021-04-15 02:33:36,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:36,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:36,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:36,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:33:36,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:36,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:36,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:33:36,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412298051] [2021-04-15 02:33:36,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:36,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:36,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:36,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:36,092 INFO L87 Difference]: Start difference. First operand 1580 states and 5010 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:36,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:36,232 INFO L93 Difference]: Finished difference Result 2534 states and 7861 transitions. [2021-04-15 02:33:36,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:33:36,233 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:36,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:36,236 INFO L225 Difference]: With dead ends: 2534 [2021-04-15 02:33:36,236 INFO L226 Difference]: Without dead ends: 2534 [2021-04-15 02:33:36,236 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:33:36,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-04-15 02:33:36,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2248. [2021-04-15 02:33:36,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 3.2158433466844683) internal successors, (7226), 2247 states have internal predecessors, (7226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 7226 transitions. [2021-04-15 02:33:36,263 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 7226 transitions. Word has length 19 [2021-04-15 02:33:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:36,263 INFO L480 AbstractCegarLoop]: Abstraction has 2248 states and 7226 transitions. [2021-04-15 02:33:36,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:36,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 7226 transitions. [2021-04-15 02:33:36,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:36,264 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:36,265 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:36,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27110,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:36,465 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:36,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:36,466 INFO L82 PathProgramCache]: Analyzing trace with hash -377496769, now seen corresponding path program 213 times [2021-04-15 02:33:36,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:36,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664963442] [2021-04-15 02:33:36,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:36,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664963442] [2021-04-15 02:33:36,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167501884] [2021-04-15 02:33:36,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:36,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:33:36,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:36,635 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:33:36,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:37,105 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:33:37,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:37,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:33:38,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:33:38,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:38,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:33:39,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:39,025 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:33:39,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:33:39,026 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:33:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:39,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:39,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:33:39,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343241711] [2021-04-15 02:33:39,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:33:39,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:39,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:33:39,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:33:39,065 INFO L87 Difference]: Start difference. First operand 2248 states and 7226 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:40,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:40,017 INFO L93 Difference]: Finished difference Result 2317 states and 7342 transitions. [2021-04-15 02:33:40,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:33:40,017 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:40,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:40,019 INFO L225 Difference]: With dead ends: 2317 [2021-04-15 02:33:40,019 INFO L226 Difference]: Without dead ends: 2307 [2021-04-15 02:33:40,020 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1111.0ms TimeCoverageRelationStatistics Valid=274, Invalid=1448, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:33:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-04-15 02:33:40,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 2248. [2021-04-15 02:33:40,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 3.2158433466844683) internal successors, (7226), 2247 states have internal predecessors, (7226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:40,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 7226 transitions. [2021-04-15 02:33:40,043 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 7226 transitions. Word has length 19 [2021-04-15 02:33:40,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:40,043 INFO L480 AbstractCegarLoop]: Abstraction has 2248 states and 7226 transitions. [2021-04-15 02:33:40,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:40,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 7226 transitions. [2021-04-15 02:33:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:40,045 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:40,045 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:40,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27111 [2021-04-15 02:33:40,246 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:40,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:40,246 INFO L82 PathProgramCache]: Analyzing trace with hash -504602600, now seen corresponding path program 214 times [2021-04-15 02:33:40,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:40,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067056288] [2021-04-15 02:33:40,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:40,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067056288] [2021-04-15 02:33:40,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308826438] [2021-04-15 02:33:40,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:40,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:40,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:40,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:33:40,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:40,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:40,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:33:40,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348974300] [2021-04-15 02:33:40,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:40,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:40,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:40,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:40,374 INFO L87 Difference]: Start difference. First operand 2248 states and 7226 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:40,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:40,552 INFO L93 Difference]: Finished difference Result 2505 states and 7772 transitions. [2021-04-15 02:33:40,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:33:40,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:40,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:40,554 INFO L225 Difference]: With dead ends: 2505 [2021-04-15 02:33:40,554 INFO L226 Difference]: Without dead ends: 2505 [2021-04-15 02:33:40,555 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:33:40,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-04-15 02:33:40,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2303. [2021-04-15 02:33:40,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 3.2132927888792353) internal successors, (7397), 2302 states have internal predecessors, (7397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:40,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 7397 transitions. [2021-04-15 02:33:40,579 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 7397 transitions. Word has length 19 [2021-04-15 02:33:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:40,579 INFO L480 AbstractCegarLoop]: Abstraction has 2303 states and 7397 transitions. [2021-04-15 02:33:40,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:40,579 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 7397 transitions. [2021-04-15 02:33:40,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:40,581 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:40,581 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:40,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27818,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:40,782 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:40,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:40,782 INFO L82 PathProgramCache]: Analyzing trace with hash -2108266501, now seen corresponding path program 215 times [2021-04-15 02:33:40,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:40,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038836892] [2021-04-15 02:33:40,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:40,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038836892] [2021-04-15 02:33:40,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608543399] [2021-04-15 02:33:40,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:41,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:33:41,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:41,120 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:33:41,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:41,655 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:33:41,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:41,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:33:42,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:33:42,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:42,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:33:43,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:43,067 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:33:43,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:33:43,068 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:33:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:43,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:43,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:33:43,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780181393] [2021-04-15 02:33:43,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:33:43,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:43,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:33:43,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:33:43,105 INFO L87 Difference]: Start difference. First operand 2303 states and 7397 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:44,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:44,224 INFO L93 Difference]: Finished difference Result 2362 states and 7496 transitions. [2021-04-15 02:33:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:33:44,225 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:44,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:44,227 INFO L225 Difference]: With dead ends: 2362 [2021-04-15 02:33:44,227 INFO L226 Difference]: Without dead ends: 2352 [2021-04-15 02:33:44,227 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1308.6ms TimeCoverageRelationStatistics Valid=297, Invalid=1509, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:33:44,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2021-04-15 02:33:44,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 2305. [2021-04-15 02:33:44,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2305 states, 2304 states have (on average 3.2118055555555554) internal successors, (7400), 2304 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:44,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 7400 transitions. [2021-04-15 02:33:44,251 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 7400 transitions. Word has length 19 [2021-04-15 02:33:44,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:44,251 INFO L480 AbstractCegarLoop]: Abstraction has 2305 states and 7400 transitions. [2021-04-15 02:33:44,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:44,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 7400 transitions. [2021-04-15 02:33:44,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:44,253 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:44,253 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:44,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27819 [2021-04-15 02:33:44,454 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:44,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:44,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1772059778, now seen corresponding path program 216 times [2021-04-15 02:33:44,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:44,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772374941] [2021-04-15 02:33:44,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:44,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772374941] [2021-04-15 02:33:44,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423618414] [2021-04-15 02:33:44,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:44,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:33:44,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:44,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:33:44,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:44,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:44,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:33:44,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770761978] [2021-04-15 02:33:44,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:33:44,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:44,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:33:44,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:33:44,616 INFO L87 Difference]: Start difference. First operand 2305 states and 7400 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:44,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:44,885 INFO L93 Difference]: Finished difference Result 2562 states and 7913 transitions. [2021-04-15 02:33:44,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:33:44,885 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:44,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:44,889 INFO L225 Difference]: With dead ends: 2562 [2021-04-15 02:33:44,889 INFO L226 Difference]: Without dead ends: 2562 [2021-04-15 02:33:44,889 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:33:44,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-04-15 02:33:44,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 2326. [2021-04-15 02:33:44,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 2325 states have (on average 3.2098924731182796) internal successors, (7463), 2325 states have internal predecessors, (7463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:44,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 7463 transitions. [2021-04-15 02:33:44,917 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 7463 transitions. Word has length 19 [2021-04-15 02:33:44,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:44,917 INFO L480 AbstractCegarLoop]: Abstraction has 2326 states and 7463 transitions. [2021-04-15 02:33:44,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:44,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 7463 transitions. [2021-04-15 02:33:44,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:44,919 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:44,919 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:45,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28336,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:45,120 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:45,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:45,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1053335259, now seen corresponding path program 217 times [2021-04-15 02:33:45,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:45,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568561650] [2021-04-15 02:33:45,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:45,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568561650] [2021-04-15 02:33:45,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964004469] [2021-04-15 02:33:45,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:45,295 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:33:45,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:45,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:45,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:33:46,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:46,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:46,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:33:46,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:33:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:46,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:46,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:33:46,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023467298] [2021-04-15 02:33:46,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:33:46,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:46,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:33:46,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:33:46,072 INFO L87 Difference]: Start difference. First operand 2326 states and 7463 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:46,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:46,673 INFO L93 Difference]: Finished difference Result 2367 states and 7538 transitions. [2021-04-15 02:33:46,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:33:46,674 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:46,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:46,677 INFO L225 Difference]: With dead ends: 2367 [2021-04-15 02:33:46,677 INFO L226 Difference]: Without dead ends: 2352 [2021-04-15 02:33:46,677 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 432.4ms TimeCoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:33:46,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2021-04-15 02:33:46,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 2329. [2021-04-15 02:33:46,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 2328 states have (on average 3.2083333333333335) internal successors, (7469), 2328 states have internal predecessors, (7469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:46,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 7469 transitions. [2021-04-15 02:33:46,703 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 7469 transitions. Word has length 19 [2021-04-15 02:33:46,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:46,703 INFO L480 AbstractCegarLoop]: Abstraction has 2329 states and 7469 transitions. [2021-04-15 02:33:46,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 7469 transitions. [2021-04-15 02:33:46,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:46,705 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:46,705 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:46,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28337 [2021-04-15 02:33:46,905 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:46,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:46,906 INFO L82 PathProgramCache]: Analyzing trace with hash -201001835, now seen corresponding path program 218 times [2021-04-15 02:33:46,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:46,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549789563] [2021-04-15 02:33:46,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:47,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549789563] [2021-04-15 02:33:47,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31244480] [2021-04-15 02:33:47,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:47,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:47,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:47,079 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:33:47,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:47,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:47,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:33:48,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:48,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:48,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:33:48,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:33:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:48,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:48,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:33:48,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612164790] [2021-04-15 02:33:48,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:33:48,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:48,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:33:48,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:33:48,353 INFO L87 Difference]: Start difference. First operand 2329 states and 7469 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:48,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:48,991 INFO L93 Difference]: Finished difference Result 2368 states and 7549 transitions. [2021-04-15 02:33:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:33:48,992 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:48,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:48,995 INFO L225 Difference]: With dead ends: 2368 [2021-04-15 02:33:48,995 INFO L226 Difference]: Without dead ends: 2359 [2021-04-15 02:33:48,995 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 484.1ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:33:48,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-04-15 02:33:49,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2332. [2021-04-15 02:33:49,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2331 states have (on average 3.208065208065208) internal successors, (7478), 2331 states have internal predecessors, (7478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 7478 transitions. [2021-04-15 02:33:49,021 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 7478 transitions. Word has length 19 [2021-04-15 02:33:49,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:49,021 INFO L480 AbstractCegarLoop]: Abstraction has 2332 states and 7478 transitions. [2021-04-15 02:33:49,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:49,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 7478 transitions. [2021-04-15 02:33:49,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:49,023 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:49,023 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:49,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28473,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:49,223 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:49,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:49,223 INFO L82 PathProgramCache]: Analyzing trace with hash 542581525, now seen corresponding path program 219 times [2021-04-15 02:33:49,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:49,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110646176] [2021-04-15 02:33:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:49,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110646176] [2021-04-15 02:33:49,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892658274] [2021-04-15 02:33:49,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:49,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:33:49,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:49,391 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:33:49,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:49,820 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:33:49,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:49,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:33:50,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:33:50,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:50,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:33:51,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:51,264 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:33:51,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:33:51,265 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:33:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:51,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:51,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:33:51,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782387010] [2021-04-15 02:33:51,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:33:51,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:51,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:33:51,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:33:51,310 INFO L87 Difference]: Start difference. First operand 2332 states and 7478 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:51,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:51,958 INFO L93 Difference]: Finished difference Result 2450 states and 7759 transitions. [2021-04-15 02:33:51,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:33:51,959 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:51,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:51,962 INFO L225 Difference]: With dead ends: 2450 [2021-04-15 02:33:51,962 INFO L226 Difference]: Without dead ends: 2440 [2021-04-15 02:33:51,962 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 532.0ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:33:51,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-04-15 02:33:51,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2330. [2021-04-15 02:33:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 3.2086732503220268) internal successors, (7473), 2329 states have internal predecessors, (7473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:51,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 7473 transitions. [2021-04-15 02:33:51,989 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 7473 transitions. Word has length 19 [2021-04-15 02:33:51,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:51,989 INFO L480 AbstractCegarLoop]: Abstraction has 2330 states and 7473 transitions. [2021-04-15 02:33:51,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:51,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 7473 transitions. [2021-04-15 02:33:51,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:51,991 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:51,991 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:52,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28862,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:52,191 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:52,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:52,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1500320577, now seen corresponding path program 220 times [2021-04-15 02:33:52,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:52,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170402644] [2021-04-15 02:33:52,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:52,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170402644] [2021-04-15 02:33:52,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227803935] [2021-04-15 02:33:52,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:52,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:52,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:52,367 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:33:52,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:52,830 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:33:52,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:52,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:33:53,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:33:54,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:54,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:33:54,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:54,322 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:33:54,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:33:54,323 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:33:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:54,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:54,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:33:54,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875002835] [2021-04-15 02:33:54,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:33:54,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:54,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:33:54,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:33:54,365 INFO L87 Difference]: Start difference. First operand 2330 states and 7473 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:55,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:55,566 INFO L93 Difference]: Finished difference Result 2446 states and 7756 transitions. [2021-04-15 02:33:55,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:33:55,567 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:55,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:55,570 INFO L225 Difference]: With dead ends: 2446 [2021-04-15 02:33:55,570 INFO L226 Difference]: Without dead ends: 2436 [2021-04-15 02:33:55,570 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1258.6ms TimeCoverageRelationStatistics Valid=318, Invalid=1844, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 02:33:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-04-15 02:33:55,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 2330. [2021-04-15 02:33:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 3.2086732503220268) internal successors, (7473), 2329 states have internal predecessors, (7473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:55,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 7473 transitions. [2021-04-15 02:33:55,597 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 7473 transitions. Word has length 19 [2021-04-15 02:33:55,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:55,598 INFO L480 AbstractCegarLoop]: Abstraction has 2330 states and 7473 transitions. [2021-04-15 02:33:55,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:55,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 7473 transitions. [2021-04-15 02:33:55,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:55,599 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:55,599 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:55,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29303,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:55,800 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:55,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:55,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2136787431, now seen corresponding path program 221 times [2021-04-15 02:33:55,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:55,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847627643] [2021-04-15 02:33:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:55,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847627643] [2021-04-15 02:33:55,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446844099] [2021-04-15 02:33:55,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:55,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:33:55,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:55,974 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:33:55,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:56,446 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:33:56,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:56,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:33:57,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:33:57,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:57,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:33:57,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:57,706 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:33:57,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:33:57,707 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:33:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:57,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:57,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:33:57,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664119119] [2021-04-15 02:33:57,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:33:57,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:57,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:33:57,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:33:57,750 INFO L87 Difference]: Start difference. First operand 2330 states and 7473 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:59,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:59,013 INFO L93 Difference]: Finished difference Result 2430 states and 7674 transitions. [2021-04-15 02:33:59,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:33:59,014 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:33:59,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:59,017 INFO L225 Difference]: With dead ends: 2430 [2021-04-15 02:33:59,017 INFO L226 Difference]: Without dead ends: 2420 [2021-04-15 02:33:59,017 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1354.4ms TimeCoverageRelationStatistics Valid=336, Invalid=1826, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 02:33:59,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2021-04-15 02:33:59,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2330. [2021-04-15 02:33:59,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 3.2086732503220268) internal successors, (7473), 2329 states have internal predecessors, (7473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:59,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 7473 transitions. [2021-04-15 02:33:59,044 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 7473 transitions. Word has length 19 [2021-04-15 02:33:59,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:59,044 INFO L480 AbstractCegarLoop]: Abstraction has 2330 states and 7473 transitions. [2021-04-15 02:33:59,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:59,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 7473 transitions. [2021-04-15 02:33:59,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:33:59,046 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:59,046 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:59,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29783,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:59,246 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:59,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:59,246 INFO L82 PathProgramCache]: Analyzing trace with hash 427410133, now seen corresponding path program 222 times [2021-04-15 02:33:59,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:59,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118230417] [2021-04-15 02:33:59,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:59,378 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:59,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118230417] [2021-04-15 02:33:59,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588120879] [2021-04-15 02:33:59,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:59,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:33:59,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:59,398 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:33:59,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:59,961 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:33:59,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:59,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:34:02,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:34:02,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:02,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:34:02,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:02,428 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:34:02,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:34:02,429 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:34:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:02,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:02,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:34:02,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43341771] [2021-04-15 02:34:02,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:34:02,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:02,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:34:02,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:34:02,473 INFO L87 Difference]: Start difference. First operand 2330 states and 7473 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:03,741 INFO L93 Difference]: Finished difference Result 2388 states and 7571 transitions. [2021-04-15 02:34:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:34:03,742 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:34:03,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:03,745 INFO L225 Difference]: With dead ends: 2388 [2021-04-15 02:34:03,745 INFO L226 Difference]: Without dead ends: 2378 [2021-04-15 02:34:03,745 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1390.0ms TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 02:34:03,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2021-04-15 02:34:03,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 2330. [2021-04-15 02:34:03,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 3.2086732503220268) internal successors, (7473), 2329 states have internal predecessors, (7473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:03,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 7473 transitions. [2021-04-15 02:34:03,771 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 7473 transitions. Word has length 19 [2021-04-15 02:34:03,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:03,771 INFO L480 AbstractCegarLoop]: Abstraction has 2330 states and 7473 transitions. [2021-04-15 02:34:03,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:03,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 7473 transitions. [2021-04-15 02:34:03,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:34:03,773 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:03,773 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:03,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30240 [2021-04-15 02:34:03,974 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:03,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:03,974 INFO L82 PathProgramCache]: Analyzing trace with hash -906777413, now seen corresponding path program 223 times [2021-04-15 02:34:03,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:03,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050685201] [2021-04-15 02:34:03,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:04,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050685201] [2021-04-15 02:34:04,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737843319] [2021-04-15 02:34:04,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:04,158 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:34:04,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:04,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:04,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:34:04,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:04,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:04,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:34:04,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-04-15 02:34:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:04,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:04,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:34:04,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347607644] [2021-04-15 02:34:04,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:34:04,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:04,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:34:04,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:34:04,958 INFO L87 Difference]: Start difference. First operand 2330 states and 7473 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:05,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:05,557 INFO L93 Difference]: Finished difference Result 2366 states and 7547 transitions. [2021-04-15 02:34:05,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:34:05,558 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:34:05,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:05,561 INFO L225 Difference]: With dead ends: 2366 [2021-04-15 02:34:05,561 INFO L226 Difference]: Without dead ends: 2357 [2021-04-15 02:34:05,561 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 453.7ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:34:05,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2021-04-15 02:34:05,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2331. [2021-04-15 02:34:05,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 3.2085836909871244) internal successors, (7476), 2330 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:05,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 7476 transitions. [2021-04-15 02:34:05,588 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 7476 transitions. Word has length 19 [2021-04-15 02:34:05,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:05,588 INFO L480 AbstractCegarLoop]: Abstraction has 2331 states and 7476 transitions. [2021-04-15 02:34:05,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:05,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 7476 transitions. [2021-04-15 02:34:05,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:34:05,590 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:05,590 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:05,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31015 [2021-04-15 02:34:05,791 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:05,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:05,791 INFO L82 PathProgramCache]: Analyzing trace with hash -163194053, now seen corresponding path program 224 times [2021-04-15 02:34:05,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:05,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982868670] [2021-04-15 02:34:05,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:05,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982868670] [2021-04-15 02:34:05,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628045575] [2021-04-15 02:34:05,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:05,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:34:05,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:05,988 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:34:05,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:06,399 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:06,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:06,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:34:07,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:34:07,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:07,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:34:08,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:08,175 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:34:08,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:34:08,176 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:34:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:08,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:08,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:34:08,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111855421] [2021-04-15 02:34:08,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:34:08,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:08,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:34:08,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:34:08,223 INFO L87 Difference]: Start difference. First operand 2331 states and 7476 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:09,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:09,492 INFO L93 Difference]: Finished difference Result 2505 states and 7913 transitions. [2021-04-15 02:34:09,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:34:09,493 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:34:09,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:09,496 INFO L225 Difference]: With dead ends: 2505 [2021-04-15 02:34:09,496 INFO L226 Difference]: Without dead ends: 2495 [2021-04-15 02:34:09,497 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 785.0ms TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:34:09,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-04-15 02:34:09,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2330. [2021-04-15 02:34:09,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 3.2086732503220268) internal successors, (7473), 2329 states have internal predecessors, (7473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 7473 transitions. [2021-04-15 02:34:09,524 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 7473 transitions. Word has length 19 [2021-04-15 02:34:09,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:09,524 INFO L480 AbstractCegarLoop]: Abstraction has 2330 states and 7473 transitions. [2021-04-15 02:34:09,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:09,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 7473 transitions. [2021-04-15 02:34:09,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:34:09,526 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:09,526 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:09,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31171 [2021-04-15 02:34:09,726 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:09,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:09,726 INFO L82 PathProgramCache]: Analyzing trace with hash 687950079, now seen corresponding path program 225 times [2021-04-15 02:34:09,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:09,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389948283] [2021-04-15 02:34:09,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:09,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389948283] [2021-04-15 02:34:09,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873038905] [2021-04-15 02:34:09,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:09,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:34:09,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:09,891 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:34:09,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:10,294 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:10,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:10,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:34:11,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:34:11,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:11,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:34:11,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:11,582 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:34:11,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:34:11,583 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:34:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:11,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:11,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:34:11,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13359734] [2021-04-15 02:34:11,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:34:11,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:11,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:34:11,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:34:11,620 INFO L87 Difference]: Start difference. First operand 2330 states and 7473 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:12,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:12,977 INFO L93 Difference]: Finished difference Result 2623 states and 8211 transitions. [2021-04-15 02:34:12,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 02:34:12,978 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:34:12,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:12,982 INFO L225 Difference]: With dead ends: 2623 [2021-04-15 02:34:12,982 INFO L226 Difference]: Without dead ends: 2613 [2021-04-15 02:34:12,982 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1114.0ms TimeCoverageRelationStatistics Valid=289, Invalid=2363, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 02:34:12,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-04-15 02:34:13,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2180. [2021-04-15 02:34:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 3.199632859109683) internal successors, (6972), 2179 states have internal predecessors, (6972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 6972 transitions. [2021-04-15 02:34:13,009 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 6972 transitions. Word has length 19 [2021-04-15 02:34:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:13,009 INFO L480 AbstractCegarLoop]: Abstraction has 2180 states and 6972 transitions. [2021-04-15 02:34:13,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:13,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 6972 transitions. [2021-04-15 02:34:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:34:13,011 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:13,011 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:13,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31805,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:13,212 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:13,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:13,213 INFO L82 PathProgramCache]: Analyzing trace with hash 26686296, now seen corresponding path program 226 times [2021-04-15 02:34:13,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:13,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101747972] [2021-04-15 02:34:13,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:13,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101747972] [2021-04-15 02:34:13,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535344741] [2021-04-15 02:34:13,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:13,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:34:13,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:13,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:34:13,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:34:13,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:13,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:34:13,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395428873] [2021-04-15 02:34:13,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:34:13,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:13,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:34:13,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:34:13,336 INFO L87 Difference]: Start difference. First operand 2180 states and 6972 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:13,470 INFO L93 Difference]: Finished difference Result 2849 states and 8739 transitions. [2021-04-15 02:34:13,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:34:13,471 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:34:13,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:13,474 INFO L225 Difference]: With dead ends: 2849 [2021-04-15 02:34:13,474 INFO L226 Difference]: Without dead ends: 2849 [2021-04-15 02:34:13,474 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:34:13,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2021-04-15 02:34:13,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2607. [2021-04-15 02:34:13,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2607 states, 2606 states have (on average 3.2033768227168076) internal successors, (8348), 2606 states have internal predecessors, (8348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:13,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 8348 transitions. [2021-04-15 02:34:13,504 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 8348 transitions. Word has length 19 [2021-04-15 02:34:13,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:13,504 INFO L480 AbstractCegarLoop]: Abstraction has 2607 states and 8348 transitions. [2021-04-15 02:34:13,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:13,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 8348 transitions. [2021-04-15 02:34:13,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:34:13,506 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:13,506 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:13,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32303 [2021-04-15 02:34:13,709 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:13,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:13,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1303614395, now seen corresponding path program 227 times [2021-04-15 02:34:13,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:13,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222718526] [2021-04-15 02:34:13,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:13,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222718526] [2021-04-15 02:34:13,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290100604] [2021-04-15 02:34:13,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:13,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:34:13,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:13,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:34:13,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:14,385 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:14,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:14,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:34:16,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:34:16,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:16,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:34:16,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:16,864 INFO L628 ElimStorePlain]: treesize reduction 23, result has 43.9 percent of original size [2021-04-15 02:34:16,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:34:16,865 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:34:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:16,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:16,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:34:16,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14260281] [2021-04-15 02:34:16,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:34:16,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:16,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:34:16,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:34:16,909 INFO L87 Difference]: Start difference. First operand 2607 states and 8348 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:18,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:18,894 INFO L93 Difference]: Finished difference Result 2992 states and 9322 transitions. [2021-04-15 02:34:18,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 02:34:18,895 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:34:18,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:18,898 INFO L225 Difference]: With dead ends: 2992 [2021-04-15 02:34:18,898 INFO L226 Difference]: Without dead ends: 2982 [2021-04-15 02:34:18,899 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1468.0ms TimeCoverageRelationStatistics Valid=409, Invalid=3013, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 02:34:18,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-04-15 02:34:18,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 2558. [2021-04-15 02:34:18,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2558 states, 2557 states have (on average 3.200234649980446) internal successors, (8183), 2557 states have internal predecessors, (8183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2558 states to 2558 states and 8183 transitions. [2021-04-15 02:34:18,928 INFO L78 Accepts]: Start accepts. Automaton has 2558 states and 8183 transitions. Word has length 19 [2021-04-15 02:34:18,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:18,928 INFO L480 AbstractCegarLoop]: Abstraction has 2558 states and 8183 transitions. [2021-04-15 02:34:18,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:18,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2558 states and 8183 transitions. [2021-04-15 02:34:18,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:34:18,930 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:18,930 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:19,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32304 [2021-04-15 02:34:19,131 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:19,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:19,131 INFO L82 PathProgramCache]: Analyzing trace with hash -2034173506, now seen corresponding path program 228 times [2021-04-15 02:34:19,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:19,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462930092] [2021-04-15 02:34:19,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:19,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462930092] [2021-04-15 02:34:19,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98012756] [2021-04-15 02:34:19,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:19,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:34:19,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:19,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:34:19,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:19,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:19,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:34:19,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844025251] [2021-04-15 02:34:19,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:34:19,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:19,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:34:19,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:34:19,253 INFO L87 Difference]: Start difference. First operand 2558 states and 8183 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:19,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:19,385 INFO L93 Difference]: Finished difference Result 2820 states and 8597 transitions. [2021-04-15 02:34:19,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:34:19,386 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:34:19,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:19,390 INFO L225 Difference]: With dead ends: 2820 [2021-04-15 02:34:19,390 INFO L226 Difference]: Without dead ends: 2820 [2021-04-15 02:34:19,390 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:19,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-04-15 02:34:19,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2334. [2021-04-15 02:34:19,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2333 states have (on average 3.1795970852978996) internal successors, (7418), 2333 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:19,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 7418 transitions. [2021-04-15 02:34:19,419 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 7418 transitions. Word has length 19 [2021-04-15 02:34:19,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:19,419 INFO L480 AbstractCegarLoop]: Abstraction has 2334 states and 7418 transitions. [2021-04-15 02:34:19,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:19,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 7418 transitions. [2021-04-15 02:34:19,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:34:19,421 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:19,421 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:19,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32945,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:19,621 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:19,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:19,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1085628289, now seen corresponding path program 229 times [2021-04-15 02:34:19,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:19,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519810681] [2021-04-15 02:34:19,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:19,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519810681] [2021-04-15 02:34:19,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967280852] [2021-04-15 02:34:19,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:19,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:34:19,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:20,229 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:20,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:20,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:34:21,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:34:21,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:21,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:34:21,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:21,885 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:34:21,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:34:21,886 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:34:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:21,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:21,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:34:21,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691886544] [2021-04-15 02:34:21,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:34:21,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:21,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:34:21,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:34:21,941 INFO L87 Difference]: Start difference. First operand 2334 states and 7418 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:23,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:23,626 INFO L93 Difference]: Finished difference Result 2691 states and 8335 transitions. [2021-04-15 02:34:23,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 02:34:23,627 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:34:23,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:23,630 INFO L225 Difference]: With dead ends: 2691 [2021-04-15 02:34:23,631 INFO L226 Difference]: Without dead ends: 2679 [2021-04-15 02:34:23,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 1513.7ms TimeCoverageRelationStatistics Valid=484, Invalid=2822, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 02:34:23,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2021-04-15 02:34:23,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 2412. [2021-04-15 02:34:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 3.1824968892575694) internal successors, (7673), 2411 states have internal predecessors, (7673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:23,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 7673 transitions. [2021-04-15 02:34:23,659 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 7673 transitions. Word has length 19 [2021-04-15 02:34:23,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:23,659 INFO L480 AbstractCegarLoop]: Abstraction has 2412 states and 7673 transitions. [2021-04-15 02:34:23,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:23,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 7673 transitions. [2021-04-15 02:34:23,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:34:23,661 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:23,661 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:23,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32946,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:23,861 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:23,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:23,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1496317928, now seen corresponding path program 230 times [2021-04-15 02:34:23,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:23,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014348692] [2021-04-15 02:34:23,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:23,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014348692] [2021-04-15 02:34:23,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960806052] [2021-04-15 02:34:23,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:23,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:34:23,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:23,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:34:23,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:23,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:23,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:34:23,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601952138] [2021-04-15 02:34:23,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:34:23,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:23,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:34:23,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:34:23,973 INFO L87 Difference]: Start difference. First operand 2412 states and 7673 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:24,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:24,102 INFO L93 Difference]: Finished difference Result 3024 states and 9353 transitions. [2021-04-15 02:34:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:34:24,103 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:34:24,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:24,107 INFO L225 Difference]: With dead ends: 3024 [2021-04-15 02:34:24,107 INFO L226 Difference]: Without dead ends: 3024 [2021-04-15 02:34:24,107 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:24,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2021-04-15 02:34:24,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2816. [2021-04-15 02:34:24,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2815 states have (on average 3.183303730017762) internal successors, (8961), 2815 states have internal predecessors, (8961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 8961 transitions. [2021-04-15 02:34:24,139 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 8961 transitions. Word has length 19 [2021-04-15 02:34:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:24,139 INFO L480 AbstractCegarLoop]: Abstraction has 2816 states and 8961 transitions. [2021-04-15 02:34:24,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:24,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 8961 transitions. [2021-04-15 02:34:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:34:24,141 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:24,141 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:24,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33435 [2021-04-15 02:34:24,342 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:24,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:24,342 INFO L82 PathProgramCache]: Analyzing trace with hash -2137707461, now seen corresponding path program 231 times [2021-04-15 02:34:24,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:24,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711996417] [2021-04-15 02:34:24,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:34:24,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711996417] [2021-04-15 02:34:24,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474011141] [2021-04-15 02:34:24,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:24,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:34:24,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:24,506 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:34:24,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:25,023 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:25,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:25,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:34:25,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:34:25,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:25,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:34:25,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:25,748 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:34:25,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:34:25,749 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:34:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:25,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:25,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:34:25,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84288700] [2021-04-15 02:34:25,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:34:25,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:25,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:34:25,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:34:25,796 INFO L87 Difference]: Start difference. First operand 2816 states and 8961 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:27,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:27,182 INFO L93 Difference]: Finished difference Result 2958 states and 9248 transitions. [2021-04-15 02:34:27,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:34:27,183 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:34:27,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:27,187 INFO L225 Difference]: With dead ends: 2958 [2021-04-15 02:34:27,187 INFO L226 Difference]: Without dead ends: 2948 [2021-04-15 02:34:27,187 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 1394.1ms TimeCoverageRelationStatistics Valid=426, Invalid=2226, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 02:34:27,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2948 states. [2021-04-15 02:34:27,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2948 to 2818. [2021-04-15 02:34:27,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2818 states, 2817 states have (on average 3.182108626198083) internal successors, (8964), 2817 states have internal predecessors, (8964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:27,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2818 states to 2818 states and 8964 transitions. [2021-04-15 02:34:27,224 INFO L78 Accepts]: Start accepts. Automaton has 2818 states and 8964 transitions. Word has length 19 [2021-04-15 02:34:27,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:27,224 INFO L480 AbstractCegarLoop]: Abstraction has 2818 states and 8964 transitions. [2021-04-15 02:34:27,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:27,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2818 states and 8964 transitions. [2021-04-15 02:34:27,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:34:27,226 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:27,227 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:27,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33436 [2021-04-15 02:34:27,427 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:27,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:27,427 INFO L82 PathProgramCache]: Analyzing trace with hash -2002664194, now seen corresponding path program 232 times [2021-04-15 02:34:27,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:27,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245326599] [2021-04-15 02:34:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:34:27,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245326599] [2021-04-15 02:34:27,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221033543] [2021-04-15 02:34:27,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:27,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:34:27,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:27,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:34:27,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:34:27,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:27,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:34:27,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873829838] [2021-04-15 02:34:27,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:34:27,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:27,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:34:27,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:34:27,608 INFO L87 Difference]: Start difference. First operand 2818 states and 8964 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:27,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:27,714 INFO L93 Difference]: Finished difference Result 3066 states and 9599 transitions. [2021-04-15 02:34:27,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:34:27,715 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:34:27,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:27,718 INFO L225 Difference]: With dead ends: 3066 [2021-04-15 02:34:27,719 INFO L226 Difference]: Without dead ends: 3066 [2021-04-15 02:34:27,719 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:34:27,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2021-04-15 02:34:27,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 2960. [2021-04-15 02:34:27,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2960 states, 2959 states have (on average 3.175397093612707) internal successors, (9396), 2959 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2960 states to 2960 states and 9396 transitions. [2021-04-15 02:34:27,753 INFO L78 Accepts]: Start accepts. Automaton has 2960 states and 9396 transitions. Word has length 19 [2021-04-15 02:34:27,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:27,753 INFO L480 AbstractCegarLoop]: Abstraction has 2960 states and 9396 transitions. [2021-04-15 02:34:27,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:27,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2960 states and 9396 transitions. [2021-04-15 02:34:27,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:34:27,755 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:27,755 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:27,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33693,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:27,956 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:27,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:27,956 INFO L82 PathProgramCache]: Analyzing trace with hash -392423425, now seen corresponding path program 233 times [2021-04-15 02:34:27,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:27,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325967689] [2021-04-15 02:34:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:28,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325967689] [2021-04-15 02:34:28,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029287086] [2021-04-15 02:34:28,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:28,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:34:28,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:28,139 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:34:28,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:28,696 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:28,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:28,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:34:29,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:34:29,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:29,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:34:29,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:29,707 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:34:29,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:34:29,709 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:34:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:29,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:29,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:34:29,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720452111] [2021-04-15 02:34:29,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:34:29,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:29,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:34:29,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:34:29,752 INFO L87 Difference]: Start difference. First operand 2960 states and 9396 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:31,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:31,178 INFO L93 Difference]: Finished difference Result 3108 states and 9699 transitions. [2021-04-15 02:34:31,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:34:31,179 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:34:31,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:31,183 INFO L225 Difference]: With dead ends: 3108 [2021-04-15 02:34:31,183 INFO L226 Difference]: Without dead ends: 3098 [2021-04-15 02:34:31,183 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1537.1ms TimeCoverageRelationStatistics Valid=348, Invalid=1814, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 02:34:31,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2021-04-15 02:34:31,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 2956. [2021-04-15 02:34:31,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 3.1776649746192893) internal successors, (9390), 2955 states have internal predecessors, (9390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 9390 transitions. [2021-04-15 02:34:31,219 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 9390 transitions. Word has length 19 [2021-04-15 02:34:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:31,219 INFO L480 AbstractCegarLoop]: Abstraction has 2956 states and 9390 transitions. [2021-04-15 02:34:31,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 9390 transitions. [2021-04-15 02:34:31,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:34:31,221 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:31,221 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:31,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33694,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:31,421 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:31,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:31,422 INFO L82 PathProgramCache]: Analyzing trace with hash -519529256, now seen corresponding path program 234 times [2021-04-15 02:34:31,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:31,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366023656] [2021-04-15 02:34:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:31,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366023656] [2021-04-15 02:34:31,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589555092] [2021-04-15 02:34:31,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:31,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:34:31,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:31,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:34:31,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:31,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:31,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:34:31,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981428283] [2021-04-15 02:34:31,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:34:31,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:31,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:34:31,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:34:31,552 INFO L87 Difference]: Start difference. First operand 2956 states and 9390 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:31,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:31,720 INFO L93 Difference]: Finished difference Result 3117 states and 9716 transitions. [2021-04-15 02:34:31,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:34:31,721 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:34:31,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:31,725 INFO L225 Difference]: With dead ends: 3117 [2021-04-15 02:34:31,725 INFO L226 Difference]: Without dead ends: 3117 [2021-04-15 02:34:31,725 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:34:31,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2021-04-15 02:34:31,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2981. [2021-04-15 02:34:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2980 states have (on average 3.1761744966442955) internal successors, (9465), 2980 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:31,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 9465 transitions. [2021-04-15 02:34:31,758 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 9465 transitions. Word has length 19 [2021-04-15 02:34:31,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:31,758 INFO L480 AbstractCegarLoop]: Abstraction has 2981 states and 9465 transitions. [2021-04-15 02:34:31,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:31,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 9465 transitions. [2021-04-15 02:34:31,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:34:31,760 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:31,760 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:31,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34049 [2021-04-15 02:34:31,960 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:31,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:31,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2123193157, now seen corresponding path program 235 times [2021-04-15 02:34:31,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:31,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619900646] [2021-04-15 02:34:31,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:32,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619900646] [2021-04-15 02:34:32,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604076533] [2021-04-15 02:34:32,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:32,158 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:34:32,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:32,736 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:32,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:32,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:34:33,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:34:33,368 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-04-15 02:34:33,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:33,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:34:33,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:33,772 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:34:33,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:34:33,773 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:34:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:33,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:33,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:34:33,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551540415] [2021-04-15 02:34:33,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:34:33,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:33,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:34:33,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:34:33,816 INFO L87 Difference]: Start difference. First operand 2981 states and 9465 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:35,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:35,168 INFO L93 Difference]: Finished difference Result 3061 states and 9606 transitions. [2021-04-15 02:34:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:34:35,169 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:34:35,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:35,172 INFO L225 Difference]: With dead ends: 3061 [2021-04-15 02:34:35,172 INFO L226 Difference]: Without dead ends: 3051 [2021-04-15 02:34:35,172 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1534.9ms TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 02:34:35,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-04-15 02:34:35,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 2981. [2021-04-15 02:34:35,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2980 states have (on average 3.1761744966442955) internal successors, (9465), 2980 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:35,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 9465 transitions. [2021-04-15 02:34:35,203 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 9465 transitions. Word has length 19 [2021-04-15 02:34:35,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:35,203 INFO L480 AbstractCegarLoop]: Abstraction has 2981 states and 9465 transitions. [2021-04-15 02:34:35,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:35,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 9465 transitions. [2021-04-15 02:34:35,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:34:35,205 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:35,205 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:35,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34050,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:35,406 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:35,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:35,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1786986434, now seen corresponding path program 236 times [2021-04-15 02:34:35,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:35,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017077678] [2021-04-15 02:34:35,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:35,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017077678] [2021-04-15 02:34:35,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683271931] [2021-04-15 02:34:35,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:35,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:34:35,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:35,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:34:35,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:35,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:35,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:34:35,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004511455] [2021-04-15 02:34:35,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:34:35,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:35,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:34:35,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:34:35,563 INFO L87 Difference]: Start difference. First operand 2981 states and 9465 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:35,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:35,803 INFO L93 Difference]: Finished difference Result 3192 states and 9909 transitions. [2021-04-15 02:34:35,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:34:35,804 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:34:35,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:35,808 INFO L225 Difference]: With dead ends: 3192 [2021-04-15 02:34:35,808 INFO L226 Difference]: Without dead ends: 3192 [2021-04-15 02:34:35,808 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:34:35,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2021-04-15 02:34:35,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 3020. [2021-04-15 02:34:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3020 states, 3019 states have (on average 3.1738986419344153) internal successors, (9582), 3019 states have internal predecessors, (9582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:35,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3020 states to 3020 states and 9582 transitions. [2021-04-15 02:34:35,842 INFO L78 Accepts]: Start accepts. Automaton has 3020 states and 9582 transitions. Word has length 19 [2021-04-15 02:34:35,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:35,842 INFO L480 AbstractCegarLoop]: Abstraction has 3020 states and 9582 transitions. [2021-04-15 02:34:35,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:35,842 INFO L276 IsEmpty]: Start isEmpty. Operand 3020 states and 9582 transitions. [2021-04-15 02:34:35,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:34:35,844 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:35,845 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:36,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34421 [2021-04-15 02:34:36,045 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:36,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:36,045 INFO L82 PathProgramCache]: Analyzing trace with hash 57519999, now seen corresponding path program 237 times [2021-04-15 02:34:36,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:36,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823801237] [2021-04-15 02:34:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:36,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823801237] [2021-04-15 02:34:36,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541914888] [2021-04-15 02:34:36,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:36,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:34:36,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:36,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 02:34:36,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:36,779 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:36,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:36,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-04-15 02:34:37,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-04-15 02:34:37,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:37,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-04-15 02:34:37,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:37,912 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-04-15 02:34:37,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:34:37,913 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-04-15 02:34:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:37,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:37,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:34:37,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640441321] [2021-04-15 02:34:37,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:34:37,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:37,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:34:37,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:34:37,959 INFO L87 Difference]: Start difference. First operand 3020 states and 9582 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:39,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:39,324 INFO L93 Difference]: Finished difference Result 3081 states and 9687 transitions. [2021-04-15 02:34:39,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:34:39,325 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:34:39,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:39,328 INFO L225 Difference]: With dead ends: 3081 [2021-04-15 02:34:39,328 INFO L226 Difference]: Without dead ends: 3071 [2021-04-15 02:34:39,328 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1533.5ms TimeCoverageRelationStatistics Valid=347, Invalid=1633, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 02:34:39,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-04-15 02:34:39,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 3022. [2021-04-15 02:34:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3022 states, 3021 states have (on average 3.17279046673287) internal successors, (9585), 3021 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:39,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 9585 transitions. [2021-04-15 02:34:39,358 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 9585 transitions. Word has length 19 [2021-04-15 02:34:39,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:39,358 INFO L480 AbstractCegarLoop]: Abstraction has 3022 states and 9585 transitions. [2021-04-15 02:34:39,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:39,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 9585 transitions. [2021-04-15 02:34:39,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:34:39,360 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:39,360 INFO L551 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:39,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34422,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:39,561 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:39,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:39,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1871514008, now seen corresponding path program 238 times [2021-04-15 02:34:39,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:39,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757943638] [2021-04-15 02:34:39,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:39,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757943638] [2021-04-15 02:34:39,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567561143] [2021-04-15 02:34:39,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:39,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:34:39,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:39,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:34:39,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:39,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:39,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:34:39,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853943107] [2021-04-15 02:34:39,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:34:39,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:39,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:34:39,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:34:39,745 INFO L87 Difference]: Start difference. First operand 3022 states and 9585 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:40,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:40,020 INFO L93 Difference]: Finished difference Result 3333 states and 10281 transitions. [2021-04-15 02:34:40,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:34:40,021 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:34:40,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:40,025 INFO L225 Difference]: With dead ends: 3333 [2021-04-15 02:34:40,025 INFO L226 Difference]: Without dead ends: 3333 [2021-04-15 02:34:40,025 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 260.9ms TimeCoverageRelationStatistics Valid=256, Invalid=500, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:34:40,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3333 states. [2021-04-15 02:34:40,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3333 to 3036. [2021-04-15 02:34:40,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3036 states, 3035 states have (on average 3.171993410214168) internal successors, (9627), 3035 states have internal predecessors, (9627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:40,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3036 states to 3036 states and 9627 transitions. [2021-04-15 02:34:40,060 INFO L78 Accepts]: Start accepts. Automaton has 3036 states and 9627 transitions. Word has length 19 [2021-04-15 02:34:40,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:40,061 INFO L480 AbstractCegarLoop]: Abstraction has 3036 states and 9627 transitions. [2021-04-15 02:34:40,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:40,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3036 states and 9627 transitions. [2021-04-15 02:34:40,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:34:40,063 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:40,063 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:40,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34793,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:40,265 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:40,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:40,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1968008967, now seen corresponding path program 239 times [2021-04-15 02:34:40,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:40,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432041939] [2021-04-15 02:34:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:40,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432041939] [2021-04-15 02:34:40,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568180186] [2021-04-15 02:34:40,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:40,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:34:40,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:40,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:34:40,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:40,901 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:40,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:40,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:41,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:41,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:41,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:34:41,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:34:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:41,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:41,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:34:41,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297353518] [2021-04-15 02:34:41,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:34:41,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:41,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:34:41,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:34:41,891 INFO L87 Difference]: Start difference. First operand 3036 states and 9627 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:42,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:42,716 INFO L93 Difference]: Finished difference Result 3128 states and 9840 transitions. [2021-04-15 02:34:42,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:34:42,717 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:34:42,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:42,722 INFO L225 Difference]: With dead ends: 3128 [2021-04-15 02:34:42,722 INFO L226 Difference]: Without dead ends: 3117 [2021-04-15 02:34:42,722 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 555.2ms TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:34:42,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2021-04-15 02:34:42,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 3059. [2021-04-15 02:34:42,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3058 states have (on average 3.171353826030085) internal successors, (9698), 3058 states have internal predecessors, (9698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:42,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 9698 transitions. [2021-04-15 02:34:42,758 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 9698 transitions. Word has length 20 [2021-04-15 02:34:42,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:42,758 INFO L480 AbstractCegarLoop]: Abstraction has 3059 states and 9698 transitions. [2021-04-15 02:34:42,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:42,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 9698 transitions. [2021-04-15 02:34:42,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:34:42,761 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:42,761 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:42,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34794,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:42,961 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:42,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:42,961 INFO L82 PathProgramCache]: Analyzing trace with hash -750369269, now seen corresponding path program 240 times [2021-04-15 02:34:42,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:42,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370014175] [2021-04-15 02:34:42,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:43,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370014175] [2021-04-15 02:34:43,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015294068] [2021-04-15 02:34:43,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:43,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:34:43,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:43,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:34:43,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:43,571 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:43,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:43,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:44,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:44,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:44,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:34:44,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:34:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:44,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:44,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:34:44,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047003205] [2021-04-15 02:34:44,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:34:44,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:44,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:34:44,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:34:44,436 INFO L87 Difference]: Start difference. First operand 3059 states and 9698 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:45,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:45,125 INFO L93 Difference]: Finished difference Result 3147 states and 9873 transitions. [2021-04-15 02:34:45,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:34:45,126 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:34:45,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:45,131 INFO L225 Difference]: With dead ends: 3147 [2021-04-15 02:34:45,131 INFO L226 Difference]: Without dead ends: 3142 [2021-04-15 02:34:45,131 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 521.7ms TimeCoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:34:45,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3142 states. [2021-04-15 02:34:45,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3142 to 3059. [2021-04-15 02:34:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3058 states have (on average 3.171353826030085) internal successors, (9698), 3058 states have internal predecessors, (9698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:45,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 9698 transitions. [2021-04-15 02:34:45,167 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 9698 transitions. Word has length 20 [2021-04-15 02:34:45,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:45,167 INFO L480 AbstractCegarLoop]: Abstraction has 3059 states and 9698 transitions. [2021-04-15 02:34:45,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:45,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 9698 transitions. [2021-04-15 02:34:45,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:34:45,169 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:45,169 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:45,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35145,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:45,370 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:45,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:45,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1411633052, now seen corresponding path program 241 times [2021-04-15 02:34:45,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:45,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121802512] [2021-04-15 02:34:45,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:45,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121802512] [2021-04-15 02:34:45,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727429436] [2021-04-15 02:34:45,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:45,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:34:45,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:45,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:45,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:34:45,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968712671] [2021-04-15 02:34:45,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:34:45,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:45,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:34:45,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:34:45,514 INFO L87 Difference]: Start difference. First operand 3059 states and 9698 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:45,608 INFO L93 Difference]: Finished difference Result 3531 states and 10726 transitions. [2021-04-15 02:34:45,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:34:45,609 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:34:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:45,613 INFO L225 Difference]: With dead ends: 3531 [2021-04-15 02:34:45,614 INFO L226 Difference]: Without dead ends: 3531 [2021-04-15 02:34:45,614 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:34:45,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3531 states. [2021-04-15 02:34:45,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3531 to 3090. [2021-04-15 02:34:45,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 3089 states have (on average 3.17643250242797) internal successors, (9812), 3089 states have internal predecessors, (9812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 9812 transitions. [2021-04-15 02:34:45,655 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 9812 transitions. Word has length 20 [2021-04-15 02:34:45,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:45,655 INFO L480 AbstractCegarLoop]: Abstraction has 3090 states and 9812 transitions. [2021-04-15 02:34:45,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:45,655 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 9812 transitions. [2021-04-15 02:34:45,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:34:45,658 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:45,658 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:45,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35390 [2021-04-15 02:34:45,858 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:45,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:45,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1981379847, now seen corresponding path program 242 times [2021-04-15 02:34:45,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:45,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685626346] [2021-04-15 02:34:45,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:45,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685626346] [2021-04-15 02:34:45,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612453334] [2021-04-15 02:34:45,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:46,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:34:46,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:46,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:34:46,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:46,504 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:46,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:46,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:47,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:47,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:47,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:34:47,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:34:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:47,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:47,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:34:47,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002341323] [2021-04-15 02:34:47,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:34:47,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:47,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:34:47,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:34:47,539 INFO L87 Difference]: Start difference. First operand 3090 states and 9812 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:48,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:48,144 INFO L93 Difference]: Finished difference Result 3195 states and 9990 transitions. [2021-04-15 02:34:48,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:34:48,145 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:34:48,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:48,149 INFO L225 Difference]: With dead ends: 3195 [2021-04-15 02:34:48,149 INFO L226 Difference]: Without dead ends: 3186 [2021-04-15 02:34:48,149 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 482.2ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:34:48,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2021-04-15 02:34:48,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 3093. [2021-04-15 02:34:48,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3093 states, 3092 states have (on average 3.1759379042690816) internal successors, (9820), 3092 states have internal predecessors, (9820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:48,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 9820 transitions. [2021-04-15 02:34:48,185 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 9820 transitions. Word has length 20 [2021-04-15 02:34:48,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:48,185 INFO L480 AbstractCegarLoop]: Abstraction has 3093 states and 9820 transitions. [2021-04-15 02:34:48,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:48,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 9820 transitions. [2021-04-15 02:34:48,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:34:48,187 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:48,187 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:48,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35391,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:48,388 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:48,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:48,388 INFO L82 PathProgramCache]: Analyzing trace with hash 853983754, now seen corresponding path program 243 times [2021-04-15 02:34:48,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:48,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107375372] [2021-04-15 02:34:48,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:48,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107375372] [2021-04-15 02:34:48,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117606282] [2021-04-15 02:34:48,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:48,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:34:48,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:48,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:34:48,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:48,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:48,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:34:48,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104915296] [2021-04-15 02:34:48,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:34:48,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:48,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:34:48,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:34:48,537 INFO L87 Difference]: Start difference. First operand 3093 states and 9820 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:48,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:48,652 INFO L93 Difference]: Finished difference Result 3703 states and 11215 transitions. [2021-04-15 02:34:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:34:48,653 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:34:48,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:48,657 INFO L225 Difference]: With dead ends: 3703 [2021-04-15 02:34:48,657 INFO L226 Difference]: Without dead ends: 3703 [2021-04-15 02:34:48,658 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:34:48,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3703 states. [2021-04-15 02:34:48,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3703 to 3093. [2021-04-15 02:34:48,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3093 states, 3092 states have (on average 3.1759379042690816) internal successors, (9820), 3092 states have internal predecessors, (9820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 9820 transitions. [2021-04-15 02:34:48,698 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 9820 transitions. Word has length 20 [2021-04-15 02:34:48,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:48,698 INFO L480 AbstractCegarLoop]: Abstraction has 3093 states and 9820 transitions. [2021-04-15 02:34:48,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:48,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 9820 transitions. [2021-04-15 02:34:48,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:34:48,701 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:48,701 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:48,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35739,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:48,903 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:48,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:48,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1336798777, now seen corresponding path program 244 times [2021-04-15 02:34:48,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:48,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794986207] [2021-04-15 02:34:48,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:49,039 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:49,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794986207] [2021-04-15 02:34:49,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310583318] [2021-04-15 02:34:49,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:49,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:34:49,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:49,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:34:49,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:49,515 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:49,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:49,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:50,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:50,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:50,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:34:50,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:34:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:50,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:50,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:34:50,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147138307] [2021-04-15 02:34:50,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:34:50,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:50,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:34:50,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:34:50,237 INFO L87 Difference]: Start difference. First operand 3093 states and 9820 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:50,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:50,748 INFO L93 Difference]: Finished difference Result 3179 states and 9979 transitions. [2021-04-15 02:34:50,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:34:50,749 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:34:50,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:50,753 INFO L225 Difference]: With dead ends: 3179 [2021-04-15 02:34:50,753 INFO L226 Difference]: Without dead ends: 3172 [2021-04-15 02:34:50,753 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 471.4ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:34:50,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3172 states. [2021-04-15 02:34:50,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3172 to 3095. [2021-04-15 02:34:50,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3095 states, 3094 states have (on average 3.1758241758241756) internal successors, (9826), 3094 states have internal predecessors, (9826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3095 states to 3095 states and 9826 transitions. [2021-04-15 02:34:50,795 INFO L78 Accepts]: Start accepts. Automaton has 3095 states and 9826 transitions. Word has length 20 [2021-04-15 02:34:50,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:50,795 INFO L480 AbstractCegarLoop]: Abstraction has 3095 states and 9826 transitions. [2021-04-15 02:34:50,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:50,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3095 states and 9826 transitions. [2021-04-15 02:34:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:34:50,798 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:50,798 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:50,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35740 [2021-04-15 02:34:50,999 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:50,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:50,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1830772426, now seen corresponding path program 245 times [2021-04-15 02:34:50,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:50,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303182731] [2021-04-15 02:34:50,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:51,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303182731] [2021-04-15 02:34:51,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847157513] [2021-04-15 02:34:51,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:51,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:34:51,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:51,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:34:51,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:51,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:51,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:34:51,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174861977] [2021-04-15 02:34:51,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:34:51,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:51,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:34:51,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:34:51,160 INFO L87 Difference]: Start difference. First operand 3095 states and 9826 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:51,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:51,318 INFO L93 Difference]: Finished difference Result 3710 states and 11245 transitions. [2021-04-15 02:34:51,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:34:51,319 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:34:51,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:51,323 INFO L225 Difference]: With dead ends: 3710 [2021-04-15 02:34:51,324 INFO L226 Difference]: Without dead ends: 3710 [2021-04-15 02:34:51,324 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:34:51,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2021-04-15 02:34:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 3080. [2021-04-15 02:34:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3080 states, 3079 states have (on average 3.1750568366352714) internal successors, (9776), 3079 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 9776 transitions. [2021-04-15 02:34:51,361 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 9776 transitions. Word has length 20 [2021-04-15 02:34:51,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:51,361 INFO L480 AbstractCegarLoop]: Abstraction has 3080 states and 9776 transitions. [2021-04-15 02:34:51,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:51,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 9776 transitions. [2021-04-15 02:34:51,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:34:51,363 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:51,363 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:51,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35990,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:51,564 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:51,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:51,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1926339292, now seen corresponding path program 246 times [2021-04-15 02:34:51,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:51,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358299452] [2021-04-15 02:34:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:51,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358299452] [2021-04-15 02:34:51,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494696371] [2021-04-15 02:34:51,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:51,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:34:51,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:51,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:34:51,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:51,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:51,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:34:51,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038308351] [2021-04-15 02:34:51,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:34:51,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:51,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:34:51,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:34:51,701 INFO L87 Difference]: Start difference. First operand 3080 states and 9776 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:51,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:51,878 INFO L93 Difference]: Finished difference Result 3972 states and 11947 transitions. [2021-04-15 02:34:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:34:51,879 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:34:51,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:51,883 INFO L225 Difference]: With dead ends: 3972 [2021-04-15 02:34:51,883 INFO L226 Difference]: Without dead ends: 3972 [2021-04-15 02:34:51,883 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:34:51,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3972 states. [2021-04-15 02:34:51,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3972 to 2953. [2021-04-15 02:34:51,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2953 states, 2952 states have (on average 3.165989159891599) internal successors, (9346), 2952 states have internal predecessors, (9346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:51,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2953 states to 2953 states and 9346 transitions. [2021-04-15 02:34:51,925 INFO L78 Accepts]: Start accepts. Automaton has 2953 states and 9346 transitions. Word has length 20 [2021-04-15 02:34:51,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:51,925 INFO L480 AbstractCegarLoop]: Abstraction has 2953 states and 9346 transitions. [2021-04-15 02:34:51,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:51,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2953 states and 9346 transitions. [2021-04-15 02:34:51,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:34:51,928 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:51,928 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:52,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35991,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:52,128 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:52,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:52,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1511860465, now seen corresponding path program 247 times [2021-04-15 02:34:52,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:52,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511103149] [2021-04-15 02:34:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:34:52,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511103149] [2021-04-15 02:34:52,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638371164] [2021-04-15 02:34:52,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:52,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:34:52,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:52,707 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:52,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:52,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:53,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:53,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:53,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:34:53,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:34:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:53,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:53,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:34:53,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433427509] [2021-04-15 02:34:53,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:34:53,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:53,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:34:53,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:34:53,851 INFO L87 Difference]: Start difference. First operand 2953 states and 9346 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:54,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:54,389 INFO L93 Difference]: Finished difference Result 3043 states and 9534 transitions. [2021-04-15 02:34:54,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:34:54,390 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:34:54,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:54,394 INFO L225 Difference]: With dead ends: 3043 [2021-04-15 02:34:54,394 INFO L226 Difference]: Without dead ends: 3038 [2021-04-15 02:34:54,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 447.0ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:34:54,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2021-04-15 02:34:54,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 2954. [2021-04-15 02:34:54,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2953 states have (on average 3.165932949542838) internal successors, (9349), 2953 states have internal predecessors, (9349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 9349 transitions. [2021-04-15 02:34:54,448 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 9349 transitions. Word has length 20 [2021-04-15 02:34:54,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:54,448 INFO L480 AbstractCegarLoop]: Abstraction has 2954 states and 9349 transitions. [2021-04-15 02:34:54,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:54,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 9349 transitions. [2021-04-15 02:34:54,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:34:54,450 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:54,450 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:54,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35992,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:54,651 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:54,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:54,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1121121017, now seen corresponding path program 248 times [2021-04-15 02:34:54,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:54,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078695510] [2021-04-15 02:34:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:54,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078695510] [2021-04-15 02:34:54,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239960386] [2021-04-15 02:34:54,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:54,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:34:54,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:54,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:34:54,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:55,308 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:55,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:55,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:34:55,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:34:55,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:55,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:34:55,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:34:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:56,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:56,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:34:56,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537509503] [2021-04-15 02:34:56,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:34:56,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:56,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:34:56,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:34:56,006 INFO L87 Difference]: Start difference. First operand 2954 states and 9349 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:56,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:56,495 INFO L93 Difference]: Finished difference Result 3038 states and 9501 transitions. [2021-04-15 02:34:56,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:34:56,496 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:34:56,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:56,500 INFO L225 Difference]: With dead ends: 3038 [2021-04-15 02:34:56,500 INFO L226 Difference]: Without dead ends: 3029 [2021-04-15 02:34:56,500 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 494.0ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:34:56,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2021-04-15 02:34:56,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 2953. [2021-04-15 02:34:56,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2953 states, 2952 states have (on average 3.1646341463414633) internal successors, (9342), 2952 states have internal predecessors, (9342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:56,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2953 states to 2953 states and 9342 transitions. [2021-04-15 02:34:56,535 INFO L78 Accepts]: Start accepts. Automaton has 2953 states and 9342 transitions. Word has length 20 [2021-04-15 02:34:56,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:56,535 INFO L480 AbstractCegarLoop]: Abstraction has 2953 states and 9342 transitions. [2021-04-15 02:34:56,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:56,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2953 states and 9342 transitions. [2021-04-15 02:34:56,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:34:56,538 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:56,538 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:56,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36372 [2021-04-15 02:34:56,740 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:56,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:56,741 INFO L82 PathProgramCache]: Analyzing trace with hash -187657308, now seen corresponding path program 249 times [2021-04-15 02:34:56,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:56,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828906600] [2021-04-15 02:34:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:56,798 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:34:56,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828906600] [2021-04-15 02:34:56,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831894077] [2021-04-15 02:34:56,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:56,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:34:56,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:56,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:34:56,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:34:56,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:56,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:34:56,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442657840] [2021-04-15 02:34:56,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:34:56,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:56,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:34:56,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:34:56,878 INFO L87 Difference]: Start difference. First operand 2953 states and 9342 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:56,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:56,968 INFO L93 Difference]: Finished difference Result 3213 states and 9806 transitions. [2021-04-15 02:34:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:34:56,969 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:34:56,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:56,974 INFO L225 Difference]: With dead ends: 3213 [2021-04-15 02:34:56,974 INFO L226 Difference]: Without dead ends: 3213 [2021-04-15 02:34:56,974 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:34:56,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2021-04-15 02:34:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 2975. [2021-04-15 02:34:57,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 3.1664425016812374) internal successors, (9417), 2974 states have internal predecessors, (9417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:57,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 9417 transitions. [2021-04-15 02:34:57,010 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 9417 transitions. Word has length 20 [2021-04-15 02:34:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:57,010 INFO L480 AbstractCegarLoop]: Abstraction has 2975 states and 9417 transitions. [2021-04-15 02:34:57,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 9417 transitions. [2021-04-15 02:34:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:34:57,012 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:57,013 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:57,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36632 [2021-04-15 02:34:57,217 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:57,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:57,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2046450186, now seen corresponding path program 250 times [2021-04-15 02:34:57,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:57,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199783644] [2021-04-15 02:34:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:57,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199783644] [2021-04-15 02:34:57,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001264920] [2021-04-15 02:34:57,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:57,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:34:57,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:57,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:34:57,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:57,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:57,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:34:57,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291132079] [2021-04-15 02:34:57,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:34:57,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:57,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:34:57,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:34:57,395 INFO L87 Difference]: Start difference. First operand 2975 states and 9417 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:57,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:57,509 INFO L93 Difference]: Finished difference Result 3374 states and 10226 transitions. [2021-04-15 02:34:57,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:34:57,510 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:34:57,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:57,515 INFO L225 Difference]: With dead ends: 3374 [2021-04-15 02:34:57,515 INFO L226 Difference]: Without dead ends: 3374 [2021-04-15 02:34:57,515 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:34:57,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3374 states. [2021-04-15 02:34:57,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3374 to 2957. [2021-04-15 02:34:57,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2957 states, 2956 states have (on average 3.1637347767253043) internal successors, (9352), 2956 states have internal predecessors, (9352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:57,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2957 states to 2957 states and 9352 transitions. [2021-04-15 02:34:57,552 INFO L78 Accepts]: Start accepts. Automaton has 2957 states and 9352 transitions. Word has length 20 [2021-04-15 02:34:57,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:57,552 INFO L480 AbstractCegarLoop]: Abstraction has 2957 states and 9352 transitions. [2021-04-15 02:34:57,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:57,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2957 states and 9352 transitions. [2021-04-15 02:34:57,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:34:57,554 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:57,554 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:57,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36633 [2021-04-15 02:34:57,755 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:57,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:57,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1710661532, now seen corresponding path program 251 times [2021-04-15 02:34:57,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:57,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532927551] [2021-04-15 02:34:57,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:57,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532927551] [2021-04-15 02:34:57,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247363536] [2021-04-15 02:34:57,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:57,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:34:57,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:57,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:34:57,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:57,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:57,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:34:57,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937694267] [2021-04-15 02:34:57,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:34:57,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:57,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:34:57,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:34:57,879 INFO L87 Difference]: Start difference. First operand 2957 states and 9352 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:58,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:58,041 INFO L93 Difference]: Finished difference Result 3737 states and 11231 transitions. [2021-04-15 02:34:58,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:34:58,042 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:34:58,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:58,046 INFO L225 Difference]: With dead ends: 3737 [2021-04-15 02:34:58,046 INFO L226 Difference]: Without dead ends: 3737 [2021-04-15 02:34:58,047 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:34:58,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2021-04-15 02:34:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 2883. [2021-04-15 02:34:58,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2883 states, 2882 states have (on average 3.1596113809854267) internal successors, (9106), 2882 states have internal predecessors, (9106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:58,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2883 states to 2883 states and 9106 transitions. [2021-04-15 02:34:58,082 INFO L78 Accepts]: Start accepts. Automaton has 2883 states and 9106 transitions. Word has length 20 [2021-04-15 02:34:58,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:58,082 INFO L480 AbstractCegarLoop]: Abstraction has 2883 states and 9106 transitions. [2021-04-15 02:34:58,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2883 states and 9106 transitions. [2021-04-15 02:34:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:34:58,084 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:58,084 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:58,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36634 [2021-04-15 02:34:58,285 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:58,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:58,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2077959498, now seen corresponding path program 252 times [2021-04-15 02:34:58,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:58,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003382046] [2021-04-15 02:34:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:58,354 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:58,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003382046] [2021-04-15 02:34:58,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321380280] [2021-04-15 02:34:58,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:58,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:34:58,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:58,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:34:58,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:58,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:58,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:34:58,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179255598] [2021-04-15 02:34:58,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:34:58,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:58,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:34:58,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:34:58,441 INFO L87 Difference]: Start difference. First operand 2883 states and 9106 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:58,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:58,663 INFO L93 Difference]: Finished difference Result 4531 states and 13821 transitions. [2021-04-15 02:34:58,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:34:58,664 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:34:58,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:58,669 INFO L225 Difference]: With dead ends: 4531 [2021-04-15 02:34:58,670 INFO L226 Difference]: Without dead ends: 4531 [2021-04-15 02:34:58,670 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:34:58,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4531 states. [2021-04-15 02:34:58,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4531 to 3652. [2021-04-15 02:34:58,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3652 states, 3651 states have (on average 3.181594083812654) internal successors, (11616), 3651 states have internal predecessors, (11616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:58,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3652 states to 3652 states and 11616 transitions. [2021-04-15 02:34:58,719 INFO L78 Accepts]: Start accepts. Automaton has 3652 states and 11616 transitions. Word has length 20 [2021-04-15 02:34:58,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:58,719 INFO L480 AbstractCegarLoop]: Abstraction has 3652 states and 11616 transitions. [2021-04-15 02:34:58,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:58,719 INFO L276 IsEmpty]: Start isEmpty. Operand 3652 states and 11616 transitions. [2021-04-15 02:34:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:34:58,722 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:58,722 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:58,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36635 [2021-04-15 02:34:58,922 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:58,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:58,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2063705743, now seen corresponding path program 253 times [2021-04-15 02:34:58,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:58,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104943728] [2021-04-15 02:34:58,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:34:59,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104943728] [2021-04-15 02:34:59,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298171783] [2021-04-15 02:34:59,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:59,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:34:59,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:59,466 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:34:59,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:34:59,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:00,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:00,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:00,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:35:00,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:35:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:00,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:00,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-04-15 02:35:00,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451870474] [2021-04-15 02:35:00,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:35:00,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:00,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:35:00,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:35:00,090 INFO L87 Difference]: Start difference. First operand 3652 states and 11616 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:00,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:00,570 INFO L93 Difference]: Finished difference Result 3690 states and 11679 transitions. [2021-04-15 02:35:00,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:35:00,571 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:00,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:00,576 INFO L225 Difference]: With dead ends: 3690 [2021-04-15 02:35:00,576 INFO L226 Difference]: Without dead ends: 3666 [2021-04-15 02:35:00,577 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 420.8ms TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:35:00,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2021-04-15 02:35:00,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 3653. [2021-04-15 02:35:00,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 3.1812705366922236) internal successors, (11618), 3652 states have internal predecessors, (11618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:00,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 11618 transitions. [2021-04-15 02:35:00,623 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 11618 transitions. Word has length 20 [2021-04-15 02:35:00,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:00,623 INFO L480 AbstractCegarLoop]: Abstraction has 3653 states and 11618 transitions. [2021-04-15 02:35:00,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:00,623 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 11618 transitions. [2021-04-15 02:35:00,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:00,626 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:00,626 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:00,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36636,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:00,826 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:00,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:00,827 INFO L82 PathProgramCache]: Analyzing trace with hash 875393611, now seen corresponding path program 254 times [2021-04-15 02:35:00,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:00,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715434891] [2021-04-15 02:35:00,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:35:00,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715434891] [2021-04-15 02:35:00,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063097324] [2021-04-15 02:35:00,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:01,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:35:01,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:01,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:35:01,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:01,492 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:01,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:01,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:02,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:02,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:02,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:35:02,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:35:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:02,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:02,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:35:02,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891985340] [2021-04-15 02:35:02,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:35:02,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:02,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:35:02,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:35:02,782 INFO L87 Difference]: Start difference. First operand 3653 states and 11618 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:03,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:03,292 INFO L93 Difference]: Finished difference Result 3764 states and 11824 transitions. [2021-04-15 02:35:03,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:35:03,293 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:03,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:03,298 INFO L225 Difference]: With dead ends: 3764 [2021-04-15 02:35:03,298 INFO L226 Difference]: Without dead ends: 3739 [2021-04-15 02:35:03,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 582.5ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:35:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-04-15 02:35:03,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3653. [2021-04-15 02:35:03,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 3.1801752464403066) internal successors, (11614), 3652 states have internal predecessors, (11614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:03,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 11614 transitions. [2021-04-15 02:35:03,348 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 11614 transitions. Word has length 20 [2021-04-15 02:35:03,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:03,348 INFO L480 AbstractCegarLoop]: Abstraction has 3653 states and 11614 transitions. [2021-04-15 02:35:03,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 11614 transitions. [2021-04-15 02:35:03,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:03,351 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:03,351 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:03,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36835 [2021-04-15 02:35:03,552 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:03,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:03,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1936438747, now seen corresponding path program 255 times [2021-04-15 02:35:03,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:03,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008820731] [2021-04-15 02:35:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:03,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008820731] [2021-04-15 02:35:03,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484652077] [2021-04-15 02:35:03,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:03,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:35:03,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:03,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:35:03,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:04,230 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:04,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:04,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:04,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:04,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:04,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:35:04,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:35:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:05,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:05,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:35:05,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734022389] [2021-04-15 02:35:05,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:35:05,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:05,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:35:05,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:35:05,002 INFO L87 Difference]: Start difference. First operand 3653 states and 11614 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:05,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:05,786 INFO L93 Difference]: Finished difference Result 3772 states and 11825 transitions. [2021-04-15 02:35:05,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:35:05,787 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:05,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:05,792 INFO L225 Difference]: With dead ends: 3772 [2021-04-15 02:35:05,792 INFO L226 Difference]: Without dead ends: 3741 [2021-04-15 02:35:05,792 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 635.4ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:35:05,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3741 states. [2021-04-15 02:35:05,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3741 to 3653. [2021-04-15 02:35:05,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 3.1755202628696604) internal successors, (11597), 3652 states have internal predecessors, (11597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:05,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 11597 transitions. [2021-04-15 02:35:05,840 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 11597 transitions. Word has length 20 [2021-04-15 02:35:05,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:05,840 INFO L480 AbstractCegarLoop]: Abstraction has 3653 states and 11597 transitions. [2021-04-15 02:35:05,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:05,840 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 11597 transitions. [2021-04-15 02:35:05,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:05,843 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:05,843 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:06,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37270 [2021-04-15 02:35:06,044 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:06,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:06,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1306449377, now seen corresponding path program 256 times [2021-04-15 02:35:06,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:06,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773146981] [2021-04-15 02:35:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:06,188 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:06,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773146981] [2021-04-15 02:35:06,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873337958] [2021-04-15 02:35:06,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:06,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:35:06,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:06,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:35:06,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:06,722 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:06,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:06,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:07,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:07,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:07,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:35:07,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:35:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:07,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:07,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:35:07,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445751139] [2021-04-15 02:35:07,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:35:07,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:07,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:35:07,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:35:07,465 INFO L87 Difference]: Start difference. First operand 3653 states and 11597 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:07,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:07,972 INFO L93 Difference]: Finished difference Result 3822 states and 12002 transitions. [2021-04-15 02:35:07,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:35:07,973 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:07,978 INFO L225 Difference]: With dead ends: 3822 [2021-04-15 02:35:07,978 INFO L226 Difference]: Without dead ends: 3817 [2021-04-15 02:35:07,978 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 555.9ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:35:07,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2021-04-15 02:35:08,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 3653. [2021-04-15 02:35:08,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 3.1755202628696604) internal successors, (11597), 3652 states have internal predecessors, (11597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:08,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 11597 transitions. [2021-04-15 02:35:08,023 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 11597 transitions. Word has length 20 [2021-04-15 02:35:08,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:08,023 INFO L480 AbstractCegarLoop]: Abstraction has 3653 states and 11597 transitions. [2021-04-15 02:35:08,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:08,023 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 11597 transitions. [2021-04-15 02:35:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:08,025 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:08,025 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:08,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37529 [2021-04-15 02:35:08,226 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:08,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:08,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1269922247, now seen corresponding path program 257 times [2021-04-15 02:35:08,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:08,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78228401] [2021-04-15 02:35:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:08,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78228401] [2021-04-15 02:35:08,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640059940] [2021-04-15 02:35:08,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:08,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:35:08,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:08,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:35:08,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:08,910 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:08,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:08,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:09,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:09,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:09,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:35:09,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:35:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:09,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:09,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:35:09,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135917533] [2021-04-15 02:35:09,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:35:09,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:09,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:35:09,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:35:09,496 INFO L87 Difference]: Start difference. First operand 3653 states and 11597 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:10,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:10,105 INFO L93 Difference]: Finished difference Result 3708 states and 11695 transitions. [2021-04-15 02:35:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:35:10,106 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:10,111 INFO L225 Difference]: With dead ends: 3708 [2021-04-15 02:35:10,111 INFO L226 Difference]: Without dead ends: 3699 [2021-04-15 02:35:10,111 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 501.3ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:35:10,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2021-04-15 02:35:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 3649. [2021-04-15 02:35:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 3.1746162280701755) internal successors, (11581), 3648 states have internal predecessors, (11581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:10,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 11581 transitions. [2021-04-15 02:35:10,161 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 11581 transitions. Word has length 20 [2021-04-15 02:35:10,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:10,161 INFO L480 AbstractCegarLoop]: Abstraction has 3649 states and 11581 transitions. [2021-04-15 02:35:10,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:10,161 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 11581 transitions. [2021-04-15 02:35:10,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:10,163 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:10,163 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:10,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37782,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:10,364 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:10,364 INFO L82 PathProgramCache]: Analyzing trace with hash 142526154, now seen corresponding path program 258 times [2021-04-15 02:35:10,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:10,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407988201] [2021-04-15 02:35:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:35:10,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407988201] [2021-04-15 02:35:10,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360414873] [2021-04-15 02:35:10,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:10,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:35:10,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:10,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:10,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:35:10,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:10,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:35:10,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932356532] [2021-04-15 02:35:10,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:35:10,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:10,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:35:10,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:35:10,507 INFO L87 Difference]: Start difference. First operand 3649 states and 11581 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:10,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:10,611 INFO L93 Difference]: Finished difference Result 3900 states and 12054 transitions. [2021-04-15 02:35:10,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:35:10,612 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:10,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:10,617 INFO L225 Difference]: With dead ends: 3900 [2021-04-15 02:35:10,617 INFO L226 Difference]: Without dead ends: 3900 [2021-04-15 02:35:10,617 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:35:10,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2021-04-15 02:35:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 3682. [2021-04-15 02:35:10,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3681 states have (on average 3.176582450421081) internal successors, (11693), 3681 states have internal predecessors, (11693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 11693 transitions. [2021-04-15 02:35:10,667 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 11693 transitions. Word has length 20 [2021-04-15 02:35:10,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:10,667 INFO L480 AbstractCegarLoop]: Abstraction has 3682 states and 11693 transitions. [2021-04-15 02:35:10,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:10,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 11693 transitions. [2021-04-15 02:35:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:10,671 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:10,671 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:10,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37978,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:10,872 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:10,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:10,872 INFO L82 PathProgramCache]: Analyzing trace with hash 680381732, now seen corresponding path program 259 times [2021-04-15 02:35:10,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:10,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292897417] [2021-04-15 02:35:10,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:10,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292897417] [2021-04-15 02:35:10,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560438617] [2021-04-15 02:35:10,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:10,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:10,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:11,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:11,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:35:11,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112444735] [2021-04-15 02:35:11,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:35:11,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:11,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:35:11,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:35:11,075 INFO L87 Difference]: Start difference. First operand 3682 states and 11693 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:11,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:11,243 INFO L93 Difference]: Finished difference Result 4133 states and 12675 transitions. [2021-04-15 02:35:11,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:35:11,245 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:11,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:11,252 INFO L225 Difference]: With dead ends: 4133 [2021-04-15 02:35:11,252 INFO L226 Difference]: Without dead ends: 4133 [2021-04-15 02:35:11,253 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:35:11,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2021-04-15 02:35:11,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 3674. [2021-04-15 02:35:11,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3673 states have (on average 3.175605771848625) internal successors, (11664), 3673 states have internal predecessors, (11664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:11,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 11664 transitions. [2021-04-15 02:35:11,326 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 11664 transitions. Word has length 20 [2021-04-15 02:35:11,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:11,326 INFO L480 AbstractCegarLoop]: Abstraction has 3674 states and 11664 transitions. [2021-04-15 02:35:11,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:11,326 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 11664 transitions. [2021-04-15 02:35:11,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:11,330 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:11,330 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:11,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37979 [2021-04-15 02:35:11,537 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:11,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:11,537 INFO L82 PathProgramCache]: Analyzing trace with hash 174035466, now seen corresponding path program 260 times [2021-04-15 02:35:11,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:11,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271360408] [2021-04-15 02:35:11,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:11,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271360408] [2021-04-15 02:35:11,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116260967] [2021-04-15 02:35:11,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:11,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:35:11,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:11,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:11,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:11,691 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:11,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:11,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:35:11,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760235371] [2021-04-15 02:35:11,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:35:11,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:11,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:35:11,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:35:11,692 INFO L87 Difference]: Start difference. First operand 3674 states and 11664 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:11,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:11,888 INFO L93 Difference]: Finished difference Result 4497 states and 13839 transitions. [2021-04-15 02:35:11,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:35:11,889 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:11,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:11,895 INFO L225 Difference]: With dead ends: 4497 [2021-04-15 02:35:11,895 INFO L226 Difference]: Without dead ends: 4497 [2021-04-15 02:35:11,896 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:35:11,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4497 states. [2021-04-15 02:35:11,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4497 to 3805. [2021-04-15 02:35:11,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3805 states, 3804 states have (on average 3.1700841219768665) internal successors, (12059), 3804 states have internal predecessors, (12059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3805 states to 3805 states and 12059 transitions. [2021-04-15 02:35:11,949 INFO L78 Accepts]: Start accepts. Automaton has 3805 states and 12059 transitions. Word has length 20 [2021-04-15 02:35:11,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:11,949 INFO L480 AbstractCegarLoop]: Abstraction has 3805 states and 12059 transitions. [2021-04-15 02:35:11,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:11,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3805 states and 12059 transitions. [2021-04-15 02:35:11,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:11,952 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:11,952 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:12,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37980,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:12,152 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:12,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:12,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1657170404, now seen corresponding path program 261 times [2021-04-15 02:35:12,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:12,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354025565] [2021-04-15 02:35:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:12,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354025565] [2021-04-15 02:35:12,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627943174] [2021-04-15 02:35:12,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:12,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:35:12,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:12,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:12,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:12,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:12,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:35:12,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87484111] [2021-04-15 02:35:12,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:35:12,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:12,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:35:12,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:35:12,288 INFO L87 Difference]: Start difference. First operand 3805 states and 12059 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:12,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:12,581 INFO L93 Difference]: Finished difference Result 5026 states and 15409 transitions. [2021-04-15 02:35:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:35:12,582 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:12,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:12,589 INFO L225 Difference]: With dead ends: 5026 [2021-04-15 02:35:12,589 INFO L226 Difference]: Without dead ends: 5026 [2021-04-15 02:35:12,589 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:35:12,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2021-04-15 02:35:12,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 3945. [2021-04-15 02:35:12,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3945 states, 3944 states have (on average 3.1696247464503045) internal successors, (12501), 3944 states have internal predecessors, (12501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3945 states to 3945 states and 12501 transitions. [2021-04-15 02:35:12,647 INFO L78 Accepts]: Start accepts. Automaton has 3945 states and 12501 transitions. Word has length 20 [2021-04-15 02:35:12,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:12,647 INFO L480 AbstractCegarLoop]: Abstraction has 3945 states and 12501 transitions. [2021-04-15 02:35:12,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 3945 states and 12501 transitions. [2021-04-15 02:35:12,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:12,650 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:12,650 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:12,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37981,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:12,850 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:12,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:12,851 INFO L82 PathProgramCache]: Analyzing trace with hash -319341737, now seen corresponding path program 262 times [2021-04-15 02:35:12,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:12,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303246226] [2021-04-15 02:35:12,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:35:12,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303246226] [2021-04-15 02:35:12,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888015954] [2021-04-15 02:35:12,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:12,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:35:12,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:12,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:35:12,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:13,535 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:13,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:13,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:15,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:15,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:15,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:35:15,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:35:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:15,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:15,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:35:15,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532417002] [2021-04-15 02:35:15,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:35:15,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:15,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:35:15,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:35:15,691 INFO L87 Difference]: Start difference. First operand 3945 states and 12501 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:16,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:16,359 INFO L93 Difference]: Finished difference Result 4032 states and 12652 transitions. [2021-04-15 02:35:16,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:35:16,361 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:16,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:16,366 INFO L225 Difference]: With dead ends: 4032 [2021-04-15 02:35:16,366 INFO L226 Difference]: Without dead ends: 4022 [2021-04-15 02:35:16,366 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 528.1ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:35:16,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4022 states. [2021-04-15 02:35:16,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4022 to 3946. [2021-04-15 02:35:16,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3946 states, 3945 states have (on average 3.169835234474018) internal successors, (12505), 3945 states have internal predecessors, (12505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:16,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 12505 transitions. [2021-04-15 02:35:16,418 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 12505 transitions. Word has length 20 [2021-04-15 02:35:16,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:16,418 INFO L480 AbstractCegarLoop]: Abstraction has 3946 states and 12505 transitions. [2021-04-15 02:35:16,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:16,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 12505 transitions. [2021-04-15 02:35:16,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:16,421 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:16,421 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:16,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37982,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:16,622 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:16,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:16,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1918399472, now seen corresponding path program 263 times [2021-04-15 02:35:16,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:16,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196537019] [2021-04-15 02:35:16,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:16,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196537019] [2021-04-15 02:35:16,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735039691] [2021-04-15 02:35:16,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:16,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:35:16,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:16,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:16,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:16,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:16,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:35:16,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914308011] [2021-04-15 02:35:16,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:35:16,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:16,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:35:16,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:35:16,818 INFO L87 Difference]: Start difference. First operand 3946 states and 12505 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:17,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:17,007 INFO L93 Difference]: Finished difference Result 4830 states and 14802 transitions. [2021-04-15 02:35:17,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:35:17,008 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:17,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:17,014 INFO L225 Difference]: With dead ends: 4830 [2021-04-15 02:35:17,014 INFO L226 Difference]: Without dead ends: 4830 [2021-04-15 02:35:17,014 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:35:17,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4830 states. [2021-04-15 02:35:17,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4830 to 2145. [2021-04-15 02:35:17,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2144 states have (on average 3.1082089552238807) internal successors, (6664), 2144 states have internal predecessors, (6664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:17,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 6664 transitions. [2021-04-15 02:35:17,048 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 6664 transitions. Word has length 20 [2021-04-15 02:35:17,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:17,048 INFO L480 AbstractCegarLoop]: Abstraction has 2145 states and 6664 transitions. [2021-04-15 02:35:17,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:17,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 6664 transitions. [2021-04-15 02:35:17,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:17,050 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:17,050 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:17,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38611,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:17,250 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:17,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:17,251 INFO L82 PathProgramCache]: Analyzing trace with hash -893432886, now seen corresponding path program 264 times [2021-04-15 02:35:17,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:17,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145899290] [2021-04-15 02:35:17,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:17,327 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:17,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145899290] [2021-04-15 02:35:17,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740043277] [2021-04-15 02:35:17,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:17,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:35:17,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:17,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:17,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:17,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:17,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:35:17,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324818254] [2021-04-15 02:35:17,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:35:17,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:17,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:35:17,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:35:17,402 INFO L87 Difference]: Start difference. First operand 2145 states and 6664 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:17,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:17,688 INFO L93 Difference]: Finished difference Result 3482 states and 10381 transitions. [2021-04-15 02:35:17,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:35:17,689 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:17,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:17,693 INFO L225 Difference]: With dead ends: 3482 [2021-04-15 02:35:17,693 INFO L226 Difference]: Without dead ends: 3482 [2021-04-15 02:35:17,694 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:35:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3482 states. [2021-04-15 02:35:17,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3482 to 2142. [2021-04-15 02:35:17,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 3.114899579635684) internal successors, (6669), 2141 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:17,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 6669 transitions. [2021-04-15 02:35:17,723 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 6669 transitions. Word has length 20 [2021-04-15 02:35:17,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:17,723 INFO L480 AbstractCegarLoop]: Abstraction has 2142 states and 6669 transitions. [2021-04-15 02:35:17,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:17,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 6669 transitions. [2021-04-15 02:35:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:17,725 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:17,725 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:17,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38612 [2021-04-15 02:35:17,926 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:17,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:17,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1917147897, now seen corresponding path program 265 times [2021-04-15 02:35:17,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:17,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042928326] [2021-04-15 02:35:17,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:18,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042928326] [2021-04-15 02:35:18,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82185965] [2021-04-15 02:35:18,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:18,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:35:18,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:18,547 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:18,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:18,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:19,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:19,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:19,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:35:19,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:35:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:19,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:19,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:35:19,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376967563] [2021-04-15 02:35:19,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:35:19,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:19,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:35:19,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:35:19,770 INFO L87 Difference]: Start difference. First operand 2142 states and 6669 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:20,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:20,392 INFO L93 Difference]: Finished difference Result 2167 states and 6719 transitions. [2021-04-15 02:35:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:35:20,393 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:20,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:20,396 INFO L225 Difference]: With dead ends: 2167 [2021-04-15 02:35:20,396 INFO L226 Difference]: Without dead ends: 2162 [2021-04-15 02:35:20,396 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 470.0ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:35:20,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-04-15 02:35:20,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 2140. [2021-04-15 02:35:20,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 3.115474520804114) internal successors, (6664), 2139 states have internal predecessors, (6664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 6664 transitions. [2021-04-15 02:35:20,417 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 6664 transitions. Word has length 20 [2021-04-15 02:35:20,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:20,417 INFO L480 AbstractCegarLoop]: Abstraction has 2140 states and 6664 transitions. [2021-04-15 02:35:20,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:20,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 6664 transitions. [2021-04-15 02:35:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:20,419 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:20,419 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:20,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38613 [2021-04-15 02:35:20,619 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:20,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:20,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1281932618, now seen corresponding path program 266 times [2021-04-15 02:35:20,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:20,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714459074] [2021-04-15 02:35:20,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:20,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714459074] [2021-04-15 02:35:20,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545034797] [2021-04-15 02:35:20,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:20,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:35:20,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:20,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:20,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:20,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:20,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:35:20,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243692523] [2021-04-15 02:35:20,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:35:20,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:20,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:35:20,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:35:20,789 INFO L87 Difference]: Start difference. First operand 2140 states and 6664 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:20,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:20,986 INFO L93 Difference]: Finished difference Result 2525 states and 7390 transitions. [2021-04-15 02:35:20,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:35:20,987 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:20,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:20,990 INFO L225 Difference]: With dead ends: 2525 [2021-04-15 02:35:20,990 INFO L226 Difference]: Without dead ends: 2525 [2021-04-15 02:35:20,990 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:35:20,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-04-15 02:35:21,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 1487. [2021-04-15 02:35:21,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.057200538358008) internal successors, (4543), 1486 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:21,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4543 transitions. [2021-04-15 02:35:21,010 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4543 transitions. Word has length 20 [2021-04-15 02:35:21,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:21,010 INFO L480 AbstractCegarLoop]: Abstraction has 1487 states and 4543 transitions. [2021-04-15 02:35:21,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:21,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4543 transitions. [2021-04-15 02:35:21,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:21,012 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:21,012 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:21,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38969,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:21,212 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:21,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:21,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1529899740, now seen corresponding path program 267 times [2021-04-15 02:35:21,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:21,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018454835] [2021-04-15 02:35:21,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:21,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018454835] [2021-04-15 02:35:21,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851428929] [2021-04-15 02:35:21,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:21,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:35:21,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:21,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:21,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:21,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:21,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:35:21,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875178198] [2021-04-15 02:35:21,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:35:21,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:21,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:35:21,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:35:21,413 INFO L87 Difference]: Start difference. First operand 1487 states and 4543 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:21,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:21,694 INFO L93 Difference]: Finished difference Result 2253 states and 6558 transitions. [2021-04-15 02:35:21,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:35:21,694 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:21,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:21,697 INFO L225 Difference]: With dead ends: 2253 [2021-04-15 02:35:21,697 INFO L226 Difference]: Without dead ends: 2253 [2021-04-15 02:35:21,697 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 240.4ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:35:21,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-04-15 02:35:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1497. [2021-04-15 02:35:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 3.071524064171123) internal successors, (4595), 1496 states have internal predecessors, (4595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 4595 transitions. [2021-04-15 02:35:21,714 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 4595 transitions. Word has length 20 [2021-04-15 02:35:21,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:21,714 INFO L480 AbstractCegarLoop]: Abstraction has 1497 states and 4595 transitions. [2021-04-15 02:35:21,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:21,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 4595 transitions. [2021-04-15 02:35:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:21,715 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:21,715 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:21,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38970,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:21,916 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:21,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:21,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1497610378, now seen corresponding path program 268 times [2021-04-15 02:35:21,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:21,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262219254] [2021-04-15 02:35:21,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:22,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262219254] [2021-04-15 02:35:22,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713732816] [2021-04-15 02:35:22,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:22,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:35:22,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:22,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:22,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:22,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:22,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:35:22,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371983153] [2021-04-15 02:35:22,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:35:22,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:22,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:35:22,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:35:22,124 INFO L87 Difference]: Start difference. First operand 1497 states and 4595 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:22,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:22,491 INFO L93 Difference]: Finished difference Result 2352 states and 6819 transitions. [2021-04-15 02:35:22,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:35:22,492 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:22,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:22,495 INFO L225 Difference]: With dead ends: 2352 [2021-04-15 02:35:22,495 INFO L226 Difference]: Without dead ends: 2352 [2021-04-15 02:35:22,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 312.5ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:35:22,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2021-04-15 02:35:22,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 1723. [2021-04-15 02:35:22,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 3.0801393728222997) internal successors, (5304), 1722 states have internal predecessors, (5304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 5304 transitions. [2021-04-15 02:35:22,517 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 5304 transitions. Word has length 20 [2021-04-15 02:35:22,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:22,517 INFO L480 AbstractCegarLoop]: Abstraction has 1723 states and 5304 transitions. [2021-04-15 02:35:22,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:22,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 5304 transitions. [2021-04-15 02:35:22,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:22,518 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:22,519 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:22,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38971,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:22,719 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:22,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:22,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2078632399, now seen corresponding path program 269 times [2021-04-15 02:35:22,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:22,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391476385] [2021-04-15 02:35:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:22,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391476385] [2021-04-15 02:35:22,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238124841] [2021-04-15 02:35:22,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:22,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:35:22,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:22,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:35:22,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:23,370 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:23,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:23,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:26,312 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 2093 DAG size of output: 1209 [2021-04-15 02:35:26,486 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 2093 DAG size of output: 1209 [2021-04-15 02:35:26,648 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 2100 DAG size of output: 1216 [2021-04-15 02:35:26,846 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1126 DAG size of output: 1303 [2021-04-15 02:35:28,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:28,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:28,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:35:28,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:35:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:28,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:28,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:35:28,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093092843] [2021-04-15 02:35:28,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:35:28,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:28,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:35:28,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:35:28,441 INFO L87 Difference]: Start difference. First operand 1723 states and 5304 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:29,173 INFO L93 Difference]: Finished difference Result 1844 states and 5522 transitions. [2021-04-15 02:35:29,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:35:29,174 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:29,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:29,176 INFO L225 Difference]: With dead ends: 1844 [2021-04-15 02:35:29,176 INFO L226 Difference]: Without dead ends: 1834 [2021-04-15 02:35:29,176 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 499.8ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:35:29,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2021-04-15 02:35:29,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1728. [2021-04-15 02:35:29,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 3.081644470179502) internal successors, (5322), 1727 states have internal predecessors, (5322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 5322 transitions. [2021-04-15 02:35:29,194 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 5322 transitions. Word has length 20 [2021-04-15 02:35:29,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:29,194 INFO L480 AbstractCegarLoop]: Abstraction has 1728 states and 5322 transitions. [2021-04-15 02:35:29,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:29,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 5322 transitions. [2021-04-15 02:35:29,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:29,195 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:29,195 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:29,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38972 [2021-04-15 02:35:29,396 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:29,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:29,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1005776894, now seen corresponding path program 270 times [2021-04-15 02:35:29,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:29,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767720058] [2021-04-15 02:35:29,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:29,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767720058] [2021-04-15 02:35:29,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706998493] [2021-04-15 02:35:29,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:29,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:35:29,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:29,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:29,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:29,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:29,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:35:29,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329960337] [2021-04-15 02:35:29,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:35:29,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:29,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:35:29,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:35:29,553 INFO L87 Difference]: Start difference. First operand 1728 states and 5322 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:29,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:29,815 INFO L93 Difference]: Finished difference Result 2167 states and 6334 transitions. [2021-04-15 02:35:29,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:35:29,815 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:29,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:29,818 INFO L225 Difference]: With dead ends: 2167 [2021-04-15 02:35:29,818 INFO L226 Difference]: Without dead ends: 2167 [2021-04-15 02:35:29,818 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 204.8ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:35:29,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2021-04-15 02:35:29,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1405. [2021-04-15 02:35:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 3.064814814814815) internal successors, (4303), 1404 states have internal predecessors, (4303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:29,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 4303 transitions. [2021-04-15 02:35:29,835 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 4303 transitions. Word has length 20 [2021-04-15 02:35:29,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:29,835 INFO L480 AbstractCegarLoop]: Abstraction has 1405 states and 4303 transitions. [2021-04-15 02:35:29,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:29,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 4303 transitions. [2021-04-15 02:35:29,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:29,837 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:29,837 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:30,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40026,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:30,037 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:30,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:30,037 INFO L82 PathProgramCache]: Analyzing trace with hash -261680284, now seen corresponding path program 271 times [2021-04-15 02:35:30,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:30,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678184097] [2021-04-15 02:35:30,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:30,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678184097] [2021-04-15 02:35:30,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950771078] [2021-04-15 02:35:30,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:30,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:30,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:30,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:30,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:35:30,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975879406] [2021-04-15 02:35:30,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:35:30,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:30,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:35:30,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:35:30,198 INFO L87 Difference]: Start difference. First operand 1405 states and 4303 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:30,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:30,504 INFO L93 Difference]: Finished difference Result 2152 states and 6190 transitions. [2021-04-15 02:35:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:35:30,505 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:30,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:30,508 INFO L225 Difference]: With dead ends: 2152 [2021-04-15 02:35:30,508 INFO L226 Difference]: Without dead ends: 2152 [2021-04-15 02:35:30,508 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 254.0ms TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:35:30,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-04-15 02:35:30,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 1439. [2021-04-15 02:35:30,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 3.06884561891516) internal successors, (4413), 1438 states have internal predecessors, (4413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:30,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 4413 transitions. [2021-04-15 02:35:30,525 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 4413 transitions. Word has length 20 [2021-04-15 02:35:30,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:30,525 INFO L480 AbstractCegarLoop]: Abstraction has 1439 states and 4413 transitions. [2021-04-15 02:35:30,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:30,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 4413 transitions. [2021-04-15 02:35:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:30,526 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:30,526 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:30,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40027 [2021-04-15 02:35:30,727 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:30,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:30,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1932074553, now seen corresponding path program 272 times [2021-04-15 02:35:30,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:30,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499731660] [2021-04-15 02:35:30,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:30,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499731660] [2021-04-15 02:35:30,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854266323] [2021-04-15 02:35:30,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:30,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:35:30,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:30,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:35:30,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:31,513 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:31,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:31,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:32,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:32,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:32,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:35:32,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:35:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:32,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:32,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:35:32,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166674485] [2021-04-15 02:35:32,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:35:32,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:32,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:35:32,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:35:32,571 INFO L87 Difference]: Start difference. First operand 1439 states and 4413 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:33,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:33,105 INFO L93 Difference]: Finished difference Result 1477 states and 4494 transitions. [2021-04-15 02:35:33,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:35:33,105 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:33,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:33,107 INFO L225 Difference]: With dead ends: 1477 [2021-04-15 02:35:33,107 INFO L226 Difference]: Without dead ends: 1472 [2021-04-15 02:35:33,107 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 530.0ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:35:33,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2021-04-15 02:35:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1440. [2021-04-15 02:35:33,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.069492703266157) internal successors, (4417), 1439 states have internal predecessors, (4417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 4417 transitions. [2021-04-15 02:35:33,121 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 4417 transitions. Word has length 20 [2021-04-15 02:35:33,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:33,121 INFO L480 AbstractCegarLoop]: Abstraction has 1440 states and 4417 transitions. [2021-04-15 02:35:33,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 4417 transitions. [2021-04-15 02:35:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:33,123 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:33,123 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:33,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40028 [2021-04-15 02:35:33,323 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:33,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:33,323 INFO L82 PathProgramCache]: Analyzing trace with hash -998610844, now seen corresponding path program 273 times [2021-04-15 02:35:33,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:33,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997543001] [2021-04-15 02:35:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:35:33,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997543001] [2021-04-15 02:35:33,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488657335] [2021-04-15 02:35:33,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:33,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:35:33,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:33,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:33,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:35:33,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:33,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:35:33,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600984710] [2021-04-15 02:35:33,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:35:33,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:33,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:35:33,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:35:33,448 INFO L87 Difference]: Start difference. First operand 1440 states and 4417 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:33,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:33,569 INFO L93 Difference]: Finished difference Result 1688 states and 4844 transitions. [2021-04-15 02:35:33,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:35:33,570 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:33,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:33,572 INFO L225 Difference]: With dead ends: 1688 [2021-04-15 02:35:33,572 INFO L226 Difference]: Without dead ends: 1688 [2021-04-15 02:35:33,573 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:35:33,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2021-04-15 02:35:33,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1452. [2021-04-15 02:35:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 3.071674707098553) internal successors, (4457), 1451 states have internal predecessors, (4457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:33,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 4457 transitions. [2021-04-15 02:35:33,588 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 4457 transitions. Word has length 20 [2021-04-15 02:35:33,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:33,588 INFO L480 AbstractCegarLoop]: Abstraction has 1452 states and 4457 transitions. [2021-04-15 02:35:33,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:33,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 4457 transitions. [2021-04-15 02:35:33,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:33,590 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:33,590 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:33,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40363,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:33,791 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:33,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:33,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1235496650, now seen corresponding path program 274 times [2021-04-15 02:35:33,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:33,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532784823] [2021-04-15 02:35:33,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:33,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532784823] [2021-04-15 02:35:33,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26483583] [2021-04-15 02:35:33,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:33,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:35:33,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:33,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:33,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:33,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:33,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:35:33,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667225932] [2021-04-15 02:35:33,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:35:33,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:33,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:35:33,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:35:33,939 INFO L87 Difference]: Start difference. First operand 1452 states and 4457 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:34,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:34,093 INFO L93 Difference]: Finished difference Result 1715 states and 4898 transitions. [2021-04-15 02:35:34,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:35:34,094 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:34,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:34,096 INFO L225 Difference]: With dead ends: 1715 [2021-04-15 02:35:34,096 INFO L226 Difference]: Without dead ends: 1715 [2021-04-15 02:35:34,096 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:35:34,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-04-15 02:35:34,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1398. [2021-04-15 02:35:34,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.065139584824624) internal successors, (4282), 1397 states have internal predecessors, (4282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:34,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4282 transitions. [2021-04-15 02:35:34,112 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4282 transitions. Word has length 20 [2021-04-15 02:35:34,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:34,112 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 4282 transitions. [2021-04-15 02:35:34,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:34,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4282 transitions. [2021-04-15 02:35:34,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:34,114 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:34,114 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:34,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40364,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:34,314 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:34,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:34,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1773352228, now seen corresponding path program 275 times [2021-04-15 02:35:34,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:34,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215125036] [2021-04-15 02:35:34,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:34,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215125036] [2021-04-15 02:35:34,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235646230] [2021-04-15 02:35:34,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:34,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:35:34,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:34,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:34,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:34,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:34,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:35:34,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818722940] [2021-04-15 02:35:34,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:35:34,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:34,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:35:34,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:35:34,460 INFO L87 Difference]: Start difference. First operand 1398 states and 4282 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:34,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:34,654 INFO L93 Difference]: Finished difference Result 1642 states and 4666 transitions. [2021-04-15 02:35:34,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:35:34,655 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:34,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:34,657 INFO L225 Difference]: With dead ends: 1642 [2021-04-15 02:35:34,657 INFO L226 Difference]: Without dead ends: 1642 [2021-04-15 02:35:34,657 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:35:34,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-04-15 02:35:34,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1230. [2021-04-15 02:35:34,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.0496338486574452) internal successors, (3748), 1229 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:34,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 3748 transitions. [2021-04-15 02:35:34,676 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 3748 transitions. Word has length 20 [2021-04-15 02:35:34,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:34,676 INFO L480 AbstractCegarLoop]: Abstraction has 1230 states and 3748 transitions. [2021-04-15 02:35:34,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:34,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 3748 transitions. [2021-04-15 02:35:34,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:34,678 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:34,678 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:34,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40365,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:34,899 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:34,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:34,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1544826396, now seen corresponding path program 276 times [2021-04-15 02:35:34,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:34,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084894478] [2021-04-15 02:35:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:35,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084894478] [2021-04-15 02:35:35,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676136807] [2021-04-15 02:35:35,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:35,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:35:35,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:35,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:35,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:35,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:35,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:35:35,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068558176] [2021-04-15 02:35:35,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:35:35,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:35,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:35:35,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:35:35,106 INFO L87 Difference]: Start difference. First operand 1230 states and 3748 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:35,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:35,318 INFO L93 Difference]: Finished difference Result 1712 states and 4965 transitions. [2021-04-15 02:35:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:35:35,319 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:35,321 INFO L225 Difference]: With dead ends: 1712 [2021-04-15 02:35:35,321 INFO L226 Difference]: Without dead ends: 1712 [2021-04-15 02:35:35,322 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 214.4ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:35:35,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-04-15 02:35:35,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1463. [2021-04-15 02:35:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 3.056771545827633) internal successors, (4469), 1462 states have internal predecessors, (4469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4469 transitions. [2021-04-15 02:35:35,338 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4469 transitions. Word has length 20 [2021-04-15 02:35:35,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:35,338 INFO L480 AbstractCegarLoop]: Abstraction has 1463 states and 4469 transitions. [2021-04-15 02:35:35,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:35,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4469 transitions. [2021-04-15 02:35:35,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:35,339 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:35,340 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:35,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40366,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:35,540 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:35,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:35,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1482683722, now seen corresponding path program 277 times [2021-04-15 02:35:35,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:35,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998578509] [2021-04-15 02:35:35,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:35,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998578509] [2021-04-15 02:35:35,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164523651] [2021-04-15 02:35:35,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:35,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:35,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:35,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:35,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:35:35,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655319377] [2021-04-15 02:35:35,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:35:35,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:35,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:35:35,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:35:35,743 INFO L87 Difference]: Start difference. First operand 1463 states and 4469 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:36,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:36,083 INFO L93 Difference]: Finished difference Result 1740 states and 5027 transitions. [2021-04-15 02:35:36,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:35:36,084 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:36,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:36,086 INFO L225 Difference]: With dead ends: 1740 [2021-04-15 02:35:36,086 INFO L226 Difference]: Without dead ends: 1740 [2021-04-15 02:35:36,086 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 293.3ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:35:36,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2021-04-15 02:35:36,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1515. [2021-04-15 02:35:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.0548216644649933) internal successors, (4625), 1514 states have internal predecessors, (4625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:36,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 4625 transitions. [2021-04-15 02:35:36,103 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 4625 transitions. Word has length 20 [2021-04-15 02:35:36,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:36,103 INFO L480 AbstractCegarLoop]: Abstraction has 1515 states and 4625 transitions. [2021-04-15 02:35:36,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:36,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 4625 transitions. [2021-04-15 02:35:36,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:36,105 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:36,105 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:36,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40367,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:36,305 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:36,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:36,305 INFO L82 PathProgramCache]: Analyzing trace with hash 846216868, now seen corresponding path program 278 times [2021-04-15 02:35:36,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:36,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437015658] [2021-04-15 02:35:36,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:36,401 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:36,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437015658] [2021-04-15 02:35:36,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518263031] [2021-04-15 02:35:36,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:36,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:35:36,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:36,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:36,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:36,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:36,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:35:36,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866080414] [2021-04-15 02:35:36,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:35:36,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:36,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:35:36,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:35:36,494 INFO L87 Difference]: Start difference. First operand 1515 states and 4625 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:36,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:36,889 INFO L93 Difference]: Finished difference Result 1866 states and 5360 transitions. [2021-04-15 02:35:36,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:35:36,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:36,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:36,893 INFO L225 Difference]: With dead ends: 1866 [2021-04-15 02:35:36,893 INFO L226 Difference]: Without dead ends: 1866 [2021-04-15 02:35:36,893 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 342.6ms TimeCoverageRelationStatistics Valid=353, Invalid=703, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:35:36,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-04-15 02:35:36,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1532. [2021-04-15 02:35:36,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.05421293272371) internal successors, (4676), 1531 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 4676 transitions. [2021-04-15 02:35:36,910 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 4676 transitions. Word has length 20 [2021-04-15 02:35:36,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:36,910 INFO L480 AbstractCegarLoop]: Abstraction has 1532 states and 4676 transitions. [2021-04-15 02:35:36,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:36,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 4676 transitions. [2021-04-15 02:35:36,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:36,911 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:36,911 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:37,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40368 [2021-04-15 02:35:37,112 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:37,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:37,112 INFO L82 PathProgramCache]: Analyzing trace with hash -782068073, now seen corresponding path program 279 times [2021-04-15 02:35:37,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:37,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024406609] [2021-04-15 02:35:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:37,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024406609] [2021-04-15 02:35:37,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554827788] [2021-04-15 02:35:37,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:37,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:35:37,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:37,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:35:37,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:37,805 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:37,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:37,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:38,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:38,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:38,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:35:38,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:35:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:38,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:38,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:35:38,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562848904] [2021-04-15 02:35:38,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:35:38,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:38,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:35:38,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:35:38,510 INFO L87 Difference]: Start difference. First operand 1532 states and 4676 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:39,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:39,498 INFO L93 Difference]: Finished difference Result 1734 states and 5126 transitions. [2021-04-15 02:35:39,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:35:39,499 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:39,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:39,501 INFO L225 Difference]: With dead ends: 1734 [2021-04-15 02:35:39,501 INFO L226 Difference]: Without dead ends: 1724 [2021-04-15 02:35:39,501 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 523.9ms TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:35:39,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2021-04-15 02:35:39,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 1581. [2021-04-15 02:35:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 3.0753164556962025) internal successors, (4859), 1580 states have internal predecessors, (4859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 4859 transitions. [2021-04-15 02:35:39,519 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 4859 transitions. Word has length 20 [2021-04-15 02:35:39,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:39,519 INFO L480 AbstractCegarLoop]: Abstraction has 1581 states and 4859 transitions. [2021-04-15 02:35:39,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:39,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 4859 transitions. [2021-04-15 02:35:39,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:39,520 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:39,520 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:39,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40369 [2021-04-15 02:35:39,721 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:39,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:39,721 INFO L82 PathProgramCache]: Analyzing trace with hash -395866959, now seen corresponding path program 280 times [2021-04-15 02:35:39,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:39,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065709122] [2021-04-15 02:35:39,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:39,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065709122] [2021-04-15 02:35:39,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427901308] [2021-04-15 02:35:39,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:39,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:35:39,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:39,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:35:39,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:40,466 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:40,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:40,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:41,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:41,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:41,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:35:41,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:35:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:41,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:41,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 02:35:41,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789912090] [2021-04-15 02:35:41,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:35:41,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:41,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:35:41,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:35:41,023 INFO L87 Difference]: Start difference. First operand 1581 states and 4859 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:42,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:42,146 INFO L93 Difference]: Finished difference Result 1690 states and 5064 transitions. [2021-04-15 02:35:42,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:35:42,147 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:42,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:42,149 INFO L225 Difference]: With dead ends: 1690 [2021-04-15 02:35:42,149 INFO L226 Difference]: Without dead ends: 1685 [2021-04-15 02:35:42,150 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 670.0ms TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:35:42,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-04-15 02:35:42,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1585. [2021-04-15 02:35:42,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.07260101010101) internal successors, (4867), 1584 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:42,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 4867 transitions. [2021-04-15 02:35:42,167 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 4867 transitions. Word has length 20 [2021-04-15 02:35:42,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:42,167 INFO L480 AbstractCegarLoop]: Abstraction has 1585 states and 4867 transitions. [2021-04-15 02:35:42,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:42,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 4867 transitions. [2021-04-15 02:35:42,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:42,168 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:42,168 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:42,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40604,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:42,369 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:42,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:42,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1057130742, now seen corresponding path program 281 times [2021-04-15 02:35:42,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:42,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126974852] [2021-04-15 02:35:42,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:42,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126974852] [2021-04-15 02:35:42,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059006747] [2021-04-15 02:35:42,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:42,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:35:42,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:42,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:42,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:42,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:42,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:35:42,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351408554] [2021-04-15 02:35:42,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:35:42,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:42,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:35:42,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:35:42,541 INFO L87 Difference]: Start difference. First operand 1585 states and 4867 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:42,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:42,655 INFO L93 Difference]: Finished difference Result 1913 states and 5470 transitions. [2021-04-15 02:35:42,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:35:42,656 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:42,659 INFO L225 Difference]: With dead ends: 1913 [2021-04-15 02:35:42,659 INFO L226 Difference]: Without dead ends: 1913 [2021-04-15 02:35:42,659 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:35:42,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-04-15 02:35:42,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1593. [2021-04-15 02:35:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.074748743718593) internal successors, (4895), 1592 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 4895 transitions. [2021-04-15 02:35:42,677 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 4895 transitions. Word has length 20 [2021-04-15 02:35:42,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:42,677 INFO L480 AbstractCegarLoop]: Abstraction has 1593 states and 4895 transitions. [2021-04-15 02:35:42,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:42,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 4895 transitions. [2021-04-15 02:35:42,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:42,679 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:42,679 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:42,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40792 [2021-04-15 02:35:42,879 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:42,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:42,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1034884042, now seen corresponding path program 282 times [2021-04-15 02:35:42,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:42,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919167688] [2021-04-15 02:35:42,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:42,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919167688] [2021-04-15 02:35:42,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653982589] [2021-04-15 02:35:42,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:42,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:35:42,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:42,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:42,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:43,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:43,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:35:43,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714088916] [2021-04-15 02:35:43,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:35:43,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:43,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:35:43,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:35:43,071 INFO L87 Difference]: Start difference. First operand 1593 states and 4895 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:43,509 INFO L93 Difference]: Finished difference Result 2133 states and 6231 transitions. [2021-04-15 02:35:43,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:35:43,510 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:43,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:43,512 INFO L225 Difference]: With dead ends: 2133 [2021-04-15 02:35:43,513 INFO L226 Difference]: Without dead ends: 2133 [2021-04-15 02:35:43,513 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 305.7ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:35:43,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-04-15 02:35:43,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1640. [2021-04-15 02:35:43,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.0738255033557045) internal successors, (5038), 1639 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:43,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5038 transitions. [2021-04-15 02:35:43,532 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5038 transitions. Word has length 20 [2021-04-15 02:35:43,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:43,532 INFO L480 AbstractCegarLoop]: Abstraction has 1640 states and 5038 transitions. [2021-04-15 02:35:43,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:43,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5038 transitions. [2021-04-15 02:35:43,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:43,534 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:43,534 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:43,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40793,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:43,735 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:43,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:43,735 INFO L82 PathProgramCache]: Analyzing trace with hash -814361103, now seen corresponding path program 283 times [2021-04-15 02:35:43,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:43,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570269133] [2021-04-15 02:35:43,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:35:43,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570269133] [2021-04-15 02:35:43,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848748180] [2021-04-15 02:35:43,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:43,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:43,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:35:43,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:44,396 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:44,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:44,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:45,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:45,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:45,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:35:45,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:35:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:45,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:45,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-04-15 02:35:45,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559237211] [2021-04-15 02:35:45,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:35:45,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:45,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:35:45,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:35:45,853 INFO L87 Difference]: Start difference. First operand 1640 states and 5038 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:46,714 INFO L93 Difference]: Finished difference Result 1741 states and 5238 transitions. [2021-04-15 02:35:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:35:46,715 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:46,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:46,718 INFO L225 Difference]: With dead ends: 1741 [2021-04-15 02:35:46,718 INFO L226 Difference]: Without dead ends: 1736 [2021-04-15 02:35:46,718 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 569.4ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:35:46,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-04-15 02:35:46,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1667. [2021-04-15 02:35:46,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 3.073229291716687) internal successors, (5120), 1666 states have internal predecessors, (5120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 5120 transitions. [2021-04-15 02:35:46,735 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 5120 transitions. Word has length 20 [2021-04-15 02:35:46,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:46,735 INFO L480 AbstractCegarLoop]: Abstraction has 1667 states and 5120 transitions. [2021-04-15 02:35:46,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:46,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 5120 transitions. [2021-04-15 02:35:46,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:46,737 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:46,737 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:46,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40794,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:46,937 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:46,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:46,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1515719248, now seen corresponding path program 284 times [2021-04-15 02:35:46,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:46,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656898146] [2021-04-15 02:35:46,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:47,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656898146] [2021-04-15 02:35:47,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059667055] [2021-04-15 02:35:47,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:47,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:35:47,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:47,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:47,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:47,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:47,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:35:47,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861133639] [2021-04-15 02:35:47,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:35:47,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:47,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:35:47,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:35:47,090 INFO L87 Difference]: Start difference. First operand 1667 states and 5120 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:47,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:47,356 INFO L93 Difference]: Finished difference Result 1916 states and 5625 transitions. [2021-04-15 02:35:47,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:35:47,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:47,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:47,360 INFO L225 Difference]: With dead ends: 1916 [2021-04-15 02:35:47,360 INFO L226 Difference]: Without dead ends: 1916 [2021-04-15 02:35:47,360 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:35:47,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-04-15 02:35:47,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1673. [2021-04-15 02:35:47,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 3.074162679425837) internal successors, (5140), 1672 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5140 transitions. [2021-04-15 02:35:47,378 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5140 transitions. Word has length 20 [2021-04-15 02:35:47,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:47,379 INFO L480 AbstractCegarLoop]: Abstraction has 1673 states and 5140 transitions. [2021-04-15 02:35:47,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:47,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5140 transitions. [2021-04-15 02:35:47,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:47,380 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:47,380 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:47,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41225 [2021-04-15 02:35:47,581 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:47,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:47,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2142781194, now seen corresponding path program 285 times [2021-04-15 02:35:47,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:47,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486539614] [2021-04-15 02:35:47,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:47,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486539614] [2021-04-15 02:35:47,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897232758] [2021-04-15 02:35:47,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:47,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:35:47,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:47,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:47,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:47,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:47,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:35:47,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086596683] [2021-04-15 02:35:47,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:35:47,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:47,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:35:47,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:35:47,772 INFO L87 Difference]: Start difference. First operand 1673 states and 5140 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:48,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:48,148 INFO L93 Difference]: Finished difference Result 1968 states and 5758 transitions. [2021-04-15 02:35:48,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:35:48,150 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:48,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:48,152 INFO L225 Difference]: With dead ends: 1968 [2021-04-15 02:35:48,152 INFO L226 Difference]: Without dead ends: 1968 [2021-04-15 02:35:48,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:35:48,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-04-15 02:35:48,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1687. [2021-04-15 02:35:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 3.073546856465006) internal successors, (5182), 1686 states have internal predecessors, (5182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:48,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 5182 transitions. [2021-04-15 02:35:48,171 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 5182 transitions. Word has length 20 [2021-04-15 02:35:48,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:48,171 INFO L480 AbstractCegarLoop]: Abstraction has 1687 states and 5182 transitions. [2021-04-15 02:35:48,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 5182 transitions. [2021-04-15 02:35:48,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:48,172 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:48,172 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:48,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41226,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:48,373 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:48,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:48,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1900166407, now seen corresponding path program 286 times [2021-04-15 02:35:48,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:48,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493807859] [2021-04-15 02:35:48,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:48,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493807859] [2021-04-15 02:35:48,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655333087] [2021-04-15 02:35:48,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:48,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:35:48,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:48,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:35:48,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:49,039 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:49,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:49,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:49,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:49,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:49,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:35:49,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:35:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:49,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:49,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:35:49,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735636760] [2021-04-15 02:35:49,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:35:49,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:49,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:35:49,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:35:49,730 INFO L87 Difference]: Start difference. First operand 1687 states and 5182 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:50,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:50,541 INFO L93 Difference]: Finished difference Result 1892 states and 5777 transitions. [2021-04-15 02:35:50,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:35:50,542 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:50,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:50,544 INFO L225 Difference]: With dead ends: 1892 [2021-04-15 02:35:50,544 INFO L226 Difference]: Without dead ends: 1887 [2021-04-15 02:35:50,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 434.6ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:35:50,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2021-04-15 02:35:50,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1842. [2021-04-15 02:35:50,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 3.079847908745247) internal successors, (5670), 1841 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:50,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 5670 transitions. [2021-04-15 02:35:50,564 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 5670 transitions. Word has length 20 [2021-04-15 02:35:50,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:50,564 INFO L480 AbstractCegarLoop]: Abstraction has 1842 states and 5670 transitions. [2021-04-15 02:35:50,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:50,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 5670 transitions. [2021-04-15 02:35:50,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:50,566 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:50,566 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:50,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41227,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:50,767 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:50,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:50,767 INFO L82 PathProgramCache]: Analyzing trace with hash -800073397, now seen corresponding path program 287 times [2021-04-15 02:35:50,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:50,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538802744] [2021-04-15 02:35:50,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:50,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538802744] [2021-04-15 02:35:50,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861179680] [2021-04-15 02:35:50,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:50,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:35:50,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:50,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 02:35:50,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:51,498 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:35:51,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:51,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-04-15 02:35:53,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:53,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:53,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:35:53,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:35:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:53,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:53,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-04-15 02:35:53,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419675589] [2021-04-15 02:35:53,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:35:53,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:53,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:35:53,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:35:53,141 INFO L87 Difference]: Start difference. First operand 1842 states and 5670 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:54,259 INFO L93 Difference]: Finished difference Result 1910 states and 5797 transitions. [2021-04-15 02:35:54,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:35:54,260 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:54,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:54,262 INFO L225 Difference]: With dead ends: 1910 [2021-04-15 02:35:54,262 INFO L226 Difference]: Without dead ends: 1905 [2021-04-15 02:35:54,263 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 608.6ms TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:35:54,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2021-04-15 02:35:54,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1842. [2021-04-15 02:35:54,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 3.079847908745247) internal successors, (5670), 1841 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:54,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 5670 transitions. [2021-04-15 02:35:54,283 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 5670 transitions. Word has length 20 [2021-04-15 02:35:54,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:54,283 INFO L480 AbstractCegarLoop]: Abstraction has 1842 states and 5670 transitions. [2021-04-15 02:35:54,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 5670 transitions. [2021-04-15 02:35:54,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:54,285 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:54,285 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:54,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41458,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:54,485 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:54,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:54,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1461337180, now seen corresponding path program 288 times [2021-04-15 02:35:54,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:54,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383578239] [2021-04-15 02:35:54,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:54,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383578239] [2021-04-15 02:35:54,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153640985] [2021-04-15 02:35:54,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:54,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:35:54,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:54,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:54,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:54,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:54,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:35:54,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933227148] [2021-04-15 02:35:54,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:35:54,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:54,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:35:54,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:35:54,651 INFO L87 Difference]: Start difference. First operand 1842 states and 5670 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:54,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:54,805 INFO L93 Difference]: Finished difference Result 2163 states and 6234 transitions. [2021-04-15 02:35:54,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:35:54,806 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:54,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:54,809 INFO L225 Difference]: With dead ends: 2163 [2021-04-15 02:35:54,809 INFO L226 Difference]: Without dead ends: 2163 [2021-04-15 02:35:54,809 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:35:54,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-04-15 02:35:54,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1857. [2021-04-15 02:35:54,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 3.0829741379310347) internal successors, (5722), 1856 states have internal predecessors, (5722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:54,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 5722 transitions. [2021-04-15 02:35:54,830 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 5722 transitions. Word has length 20 [2021-04-15 02:35:54,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:54,830 INFO L480 AbstractCegarLoop]: Abstraction has 1857 states and 5722 transitions. [2021-04-15 02:35:54,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:54,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 5722 transitions. [2021-04-15 02:35:54,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:54,832 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:54,832 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:55,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41948 [2021-04-15 02:35:55,032 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:55,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:55,032 INFO L82 PathProgramCache]: Analyzing trace with hash 772770314, now seen corresponding path program 289 times [2021-04-15 02:35:55,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:55,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108290642] [2021-04-15 02:35:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:55,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108290642] [2021-04-15 02:35:55,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011114512] [2021-04-15 02:35:55,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:55,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:55,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:35:55,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:55,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:35:55,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637857134] [2021-04-15 02:35:55,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:35:55,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:55,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:35:55,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:35:55,172 INFO L87 Difference]: Start difference. First operand 1857 states and 5722 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:55,378 INFO L93 Difference]: Finished difference Result 2182 states and 6364 transitions. [2021-04-15 02:35:55,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:35:55,379 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:55,382 INFO L225 Difference]: With dead ends: 2182 [2021-04-15 02:35:55,382 INFO L226 Difference]: Without dead ends: 2182 [2021-04-15 02:35:55,382 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:35:55,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-04-15 02:35:55,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1922. [2021-04-15 02:35:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1921 states have (on average 3.0853722019781364) internal successors, (5927), 1921 states have internal predecessors, (5927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 5927 transitions. [2021-04-15 02:35:55,406 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 5927 transitions. Word has length 20 [2021-04-15 02:35:55,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:55,406 INFO L480 AbstractCegarLoop]: Abstraction has 1922 states and 5927 transitions. [2021-04-15 02:35:55,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:55,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 5927 transitions. [2021-04-15 02:35:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:55,409 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:55,409 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:55,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41949 [2021-04-15 02:35:55,630 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:55,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:55,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1310625892, now seen corresponding path program 290 times [2021-04-15 02:35:55,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:55,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295990606] [2021-04-15 02:35:55,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:55,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295990606] [2021-04-15 02:35:55,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182097974] [2021-04-15 02:35:55,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:55,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:35:55,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:55,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:55,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:55,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:55,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:35:55,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962985774] [2021-04-15 02:35:55,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:35:55,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:55,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:35:55,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:35:55,764 INFO L87 Difference]: Start difference. First operand 1922 states and 5927 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:55,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:55,984 INFO L93 Difference]: Finished difference Result 2209 states and 6421 transitions. [2021-04-15 02:35:55,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:35:55,985 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:55,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:55,987 INFO L225 Difference]: With dead ends: 2209 [2021-04-15 02:35:55,987 INFO L226 Difference]: Without dead ends: 2209 [2021-04-15 02:35:55,987 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:35:55,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2021-04-15 02:35:56,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 1926. [2021-04-15 02:35:56,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 3.0836363636363635) internal successors, (5936), 1925 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 5936 transitions. [2021-04-15 02:35:56,009 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 5936 transitions. Word has length 20 [2021-04-15 02:35:56,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:56,009 INFO L480 AbstractCegarLoop]: Abstraction has 1926 states and 5936 transitions. [2021-04-15 02:35:56,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:56,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 5936 transitions. [2021-04-15 02:35:56,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:56,011 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:56,011 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:56,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41950 [2021-04-15 02:35:56,212 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:56,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:56,212 INFO L82 PathProgramCache]: Analyzing trace with hash -2007552732, now seen corresponding path program 291 times [2021-04-15 02:35:56,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:56,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358964843] [2021-04-15 02:35:56,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:56,291 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:35:56,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358964843] [2021-04-15 02:35:56,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225710757] [2021-04-15 02:35:56,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:56,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:35:56,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:56,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:56,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:56,385 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:35:56,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:56,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:35:56,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920888859] [2021-04-15 02:35:56,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:35:56,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:56,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:35:56,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:35:56,385 INFO L87 Difference]: Start difference. First operand 1926 states and 5936 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:56,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:56,516 INFO L93 Difference]: Finished difference Result 2031 states and 6161 transitions. [2021-04-15 02:35:56,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:35:56,517 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:56,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:56,519 INFO L225 Difference]: With dead ends: 2031 [2021-04-15 02:35:56,519 INFO L226 Difference]: Without dead ends: 2031 [2021-04-15 02:35:56,520 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:35:56,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-04-15 02:35:56,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1963. [2021-04-15 02:35:56,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.082059123343527) internal successors, (6047), 1962 states have internal predecessors, (6047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:56,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 6047 transitions. [2021-04-15 02:35:56,540 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 6047 transitions. Word has length 20 [2021-04-15 02:35:56,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:56,540 INFO L480 AbstractCegarLoop]: Abstraction has 1963 states and 6047 transitions. [2021-04-15 02:35:56,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:56,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 6047 transitions. [2021-04-15 02:35:56,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:56,542 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:56,542 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:56,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41951 [2021-04-15 02:35:56,743 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:56,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:56,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1019957386, now seen corresponding path program 292 times [2021-04-15 02:35:56,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:56,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437660010] [2021-04-15 02:35:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:56,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437660010] [2021-04-15 02:35:56,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334187923] [2021-04-15 02:35:56,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:56,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:35:56,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:56,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:56,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:56,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:56,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:35:56,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504736365] [2021-04-15 02:35:56,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:35:56,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:56,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:35:56,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:35:56,933 INFO L87 Difference]: Start difference. First operand 1963 states and 6047 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:57,163 INFO L93 Difference]: Finished difference Result 2083 states and 6263 transitions. [2021-04-15 02:35:57,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:35:57,164 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:57,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:57,167 INFO L225 Difference]: With dead ends: 2083 [2021-04-15 02:35:57,167 INFO L226 Difference]: Without dead ends: 2083 [2021-04-15 02:35:57,167 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 208.1ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:35:57,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-04-15 02:35:57,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1962. [2021-04-15 02:35:57,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 3.0821009688934216) internal successors, (6044), 1961 states have internal predecessors, (6044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:57,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 6044 transitions. [2021-04-15 02:35:57,186 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 6044 transitions. Word has length 20 [2021-04-15 02:35:57,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:57,187 INFO L480 AbstractCegarLoop]: Abstraction has 1962 states and 6044 transitions. [2021-04-15 02:35:57,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:57,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 6044 transitions. [2021-04-15 02:35:57,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:57,188 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:57,188 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:57,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41952,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:57,389 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:57,389 INFO L82 PathProgramCache]: Analyzing trace with hash 383490532, now seen corresponding path program 293 times [2021-04-15 02:35:57,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:57,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046302362] [2021-04-15 02:35:57,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:57,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046302362] [2021-04-15 02:35:57,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244983896] [2021-04-15 02:35:57,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:57,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:35:57,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:57,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:57,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:57,573 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:57,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:57,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:35:57,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819751716] [2021-04-15 02:35:57,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:35:57,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:57,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:35:57,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:35:57,574 INFO L87 Difference]: Start difference. First operand 1962 states and 6044 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:57,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:57,868 INFO L93 Difference]: Finished difference Result 2162 states and 6455 transitions. [2021-04-15 02:35:57,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:35:57,870 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:57,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:57,872 INFO L225 Difference]: With dead ends: 2162 [2021-04-15 02:35:57,872 INFO L226 Difference]: Without dead ends: 2162 [2021-04-15 02:35:57,872 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 260.3ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:35:57,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-04-15 02:35:57,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 1974. [2021-04-15 02:35:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.0816016218955906) internal successors, (6080), 1973 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 6080 transitions. [2021-04-15 02:35:57,893 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 6080 transitions. Word has length 20 [2021-04-15 02:35:57,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:57,894 INFO L480 AbstractCegarLoop]: Abstraction has 1974 states and 6080 transitions. [2021-04-15 02:35:57,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:57,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 6080 transitions. [2021-04-15 02:35:57,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:35:57,895 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:57,895 INFO L551 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:58,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41953,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:58,105 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:58,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:58,105 INFO L82 PathProgramCache]: Analyzing trace with hash 2127854538, now seen corresponding path program 294 times [2021-04-15 02:35:58,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:58,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689253917] [2021-04-15 02:35:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:58,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689253917] [2021-04-15 02:35:58,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507086784] [2021-04-15 02:35:58,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:58,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:35:58,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:58,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 02:35:58,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:58,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:58,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:35:58,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957171706] [2021-04-15 02:35:58,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:35:58,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:58,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:35:58,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:35:58,295 INFO L87 Difference]: Start difference. First operand 1974 states and 6080 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:58,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:58,607 INFO L93 Difference]: Finished difference Result 2334 states and 6920 transitions. [2021-04-15 02:35:58,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:35:58,609 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:35:58,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:58,611 INFO L225 Difference]: With dead ends: 2334 [2021-04-15 02:35:58,611 INFO L226 Difference]: Without dead ends: 2334 [2021-04-15 02:35:58,612 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 284.6ms TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:35:58,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2021-04-15 02:35:58,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 1993. [2021-04-15 02:35:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1992 states have (on average 3.0808232931726907) internal successors, (6137), 1992 states have internal predecessors, (6137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:58,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 6137 transitions. [2021-04-15 02:35:58,634 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 6137 transitions. Word has length 20 [2021-04-15 02:35:58,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:58,634 INFO L480 AbstractCegarLoop]: Abstraction has 1993 states and 6137 transitions. [2021-04-15 02:35:58,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:58,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 6137 transitions. [2021-04-15 02:35:58,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:35:58,636 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:58,636 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:58,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41954,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:58,836 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:58,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:58,837 INFO L82 PathProgramCache]: Analyzing trace with hash 248568699, now seen corresponding path program 295 times [2021-04-15 02:35:58,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:58,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932845823] [2021-04-15 02:35:58,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:58,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932845823] [2021-04-15 02:35:58,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676692313] [2021-04-15 02:35:58,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:58,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:35:58,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:59,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:59,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:35:59,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360385542] [2021-04-15 02:35:59,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:35:59,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:59,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:35:59,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:35:59,061 INFO L87 Difference]: Start difference. First operand 1993 states and 6137 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:59,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:59,269 INFO L93 Difference]: Finished difference Result 2175 states and 6428 transitions. [2021-04-15 02:35:59,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:35:59,270 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:35:59,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:59,272 INFO L225 Difference]: With dead ends: 2175 [2021-04-15 02:35:59,272 INFO L226 Difference]: Without dead ends: 2171 [2021-04-15 02:35:59,273 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 220.4ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:35:59,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-04-15 02:35:59,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 1979. [2021-04-15 02:35:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1979 states, 1978 states have (on average 3.077350859453994) internal successors, (6087), 1978 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:59,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 6087 transitions. [2021-04-15 02:35:59,294 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 6087 transitions. Word has length 21 [2021-04-15 02:35:59,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:59,294 INFO L480 AbstractCegarLoop]: Abstraction has 1979 states and 6087 transitions. [2021-04-15 02:35:59,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:59,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 6087 transitions. [2021-04-15 02:35:59,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:35:59,296 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:59,296 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:59,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41955,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:59,496 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:59,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:59,496 INFO L82 PathProgramCache]: Analyzing trace with hash 905361256, now seen corresponding path program 296 times [2021-04-15 02:35:59,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:59,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187137301] [2021-04-15 02:35:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:59,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187137301] [2021-04-15 02:35:59,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948523853] [2021-04-15 02:35:59,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:59,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:35:59,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:59,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:35:59,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:59,681 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:59,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:59,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:35:59,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848588106] [2021-04-15 02:35:59,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:35:59,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:59,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:35:59,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:35:59,682 INFO L87 Difference]: Start difference. First operand 1979 states and 6087 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:59,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:59,969 INFO L93 Difference]: Finished difference Result 2309 states and 6715 transitions. [2021-04-15 02:35:59,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:35:59,970 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:35:59,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:59,973 INFO L225 Difference]: With dead ends: 2309 [2021-04-15 02:35:59,973 INFO L226 Difference]: Without dead ends: 2300 [2021-04-15 02:35:59,973 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 251.6ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:35:59,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-04-15 02:35:59,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 1963. [2021-04-15 02:35:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.070846075433231) internal successors, (6025), 1962 states have internal predecessors, (6025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:59,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 6025 transitions. [2021-04-15 02:35:59,996 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 6025 transitions. Word has length 21 [2021-04-15 02:35:59,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:59,997 INFO L480 AbstractCegarLoop]: Abstraction has 1963 states and 6025 transitions. [2021-04-15 02:35:59,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:59,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 6025 transitions. [2021-04-15 02:35:59,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:35:59,999 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:59,999 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:00,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41956 [2021-04-15 02:36:00,199 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:00,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:00,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1825157759, now seen corresponding path program 297 times [2021-04-15 02:36:00,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:00,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813218686] [2021-04-15 02:36:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:00,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813218686] [2021-04-15 02:36:00,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327243168] [2021-04-15 02:36:00,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:36:00,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:36:00,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:00,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:00,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:00,414 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:00,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:00,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:36:00,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147551041] [2021-04-15 02:36:00,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:00,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:00,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:00,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:00,415 INFO L87 Difference]: Start difference. First operand 1963 states and 6025 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:00,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:00,645 INFO L93 Difference]: Finished difference Result 2022 states and 6114 transitions. [2021-04-15 02:36:00,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:36:00,646 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:00,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:00,648 INFO L225 Difference]: With dead ends: 2022 [2021-04-15 02:36:00,649 INFO L226 Difference]: Without dead ends: 2018 [2021-04-15 02:36:00,649 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:36:00,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2021-04-15 02:36:00,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1963. [2021-04-15 02:36:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.0688073394495414) internal successors, (6021), 1962 states have internal predecessors, (6021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:00,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 6021 transitions. [2021-04-15 02:36:00,670 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 6021 transitions. Word has length 21 [2021-04-15 02:36:00,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:00,670 INFO L480 AbstractCegarLoop]: Abstraction has 1963 states and 6021 transitions. [2021-04-15 02:36:00,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:00,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 6021 transitions. [2021-04-15 02:36:00,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:00,672 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:00,672 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:00,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41957,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:00,872 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:00,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:00,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1163893976, now seen corresponding path program 298 times [2021-04-15 02:36:00,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:00,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421968315] [2021-04-15 02:36:00,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:00,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421968315] [2021-04-15 02:36:00,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566653790] [2021-04-15 02:36:00,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:00,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:36:00,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:00,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:00,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:01,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:01,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:36:01,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950020830] [2021-04-15 02:36:01,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:01,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:01,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:01,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:01,046 INFO L87 Difference]: Start difference. First operand 1963 states and 6021 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:01,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:01,155 INFO L93 Difference]: Finished difference Result 2284 states and 6593 transitions. [2021-04-15 02:36:01,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:36:01,156 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:01,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:01,158 INFO L225 Difference]: With dead ends: 2284 [2021-04-15 02:36:01,158 INFO L226 Difference]: Without dead ends: 2284 [2021-04-15 02:36:01,158 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:01,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-04-15 02:36:01,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 1947. [2021-04-15 02:36:01,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1946 states have (on average 3.063720452209661) internal successors, (5962), 1946 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:01,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 5962 transitions. [2021-04-15 02:36:01,179 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 5962 transitions. Word has length 21 [2021-04-15 02:36:01,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:01,179 INFO L480 AbstractCegarLoop]: Abstraction has 1947 states and 5962 transitions. [2021-04-15 02:36:01,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:01,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 5962 transitions. [2021-04-15 02:36:01,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:01,181 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:01,181 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:01,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41958 [2021-04-15 02:36:01,381 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:01,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:01,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1822635909, now seen corresponding path program 299 times [2021-04-15 02:36:01,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:01,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851188779] [2021-04-15 02:36:01,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:01,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851188779] [2021-04-15 02:36:01,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132384863] [2021-04-15 02:36:01,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:01,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:36:01,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:01,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:01,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:01,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:01,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:36:01,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725393469] [2021-04-15 02:36:01,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:01,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:01,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:01,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:01,555 INFO L87 Difference]: Start difference. First operand 1947 states and 5962 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:01,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:01,751 INFO L93 Difference]: Finished difference Result 2051 states and 6168 transitions. [2021-04-15 02:36:01,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:36:01,752 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:01,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:01,755 INFO L225 Difference]: With dead ends: 2051 [2021-04-15 02:36:01,755 INFO L226 Difference]: Without dead ends: 2043 [2021-04-15 02:36:01,755 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:36:01,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-04-15 02:36:01,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1955. [2021-04-15 02:36:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1955 states, 1954 states have (on average 3.0624360286591608) internal successors, (5984), 1954 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:01,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 5984 transitions. [2021-04-15 02:36:01,775 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 5984 transitions. Word has length 21 [2021-04-15 02:36:01,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:01,775 INFO L480 AbstractCegarLoop]: Abstraction has 1955 states and 5984 transitions. [2021-04-15 02:36:01,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:01,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 5984 transitions. [2021-04-15 02:36:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:01,778 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:01,778 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:01,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41959,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:01,978 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:01,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:01,978 INFO L82 PathProgramCache]: Analyzing trace with hash -865456514, now seen corresponding path program 300 times [2021-04-15 02:36:01,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:01,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668179341] [2021-04-15 02:36:01,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:02,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668179341] [2021-04-15 02:36:02,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589700060] [2021-04-15 02:36:02,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:02,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:36:02,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:02,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:02,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:02,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:02,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-04-15 02:36:02,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573401898] [2021-04-15 02:36:02,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:02,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:02,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:02,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:02,130 INFO L87 Difference]: Start difference. First operand 1955 states and 5984 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:02,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:02,264 INFO L93 Difference]: Finished difference Result 2386 states and 6859 transitions. [2021-04-15 02:36:02,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:36:02,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:02,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:02,267 INFO L225 Difference]: With dead ends: 2386 [2021-04-15 02:36:02,268 INFO L226 Difference]: Without dead ends: 2386 [2021-04-15 02:36:02,268 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:36:02,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-04-15 02:36:02,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1958. [2021-04-15 02:36:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1957 states have (on average 3.062851303014819) internal successors, (5994), 1957 states have internal predecessors, (5994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:02,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 5994 transitions. [2021-04-15 02:36:02,289 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 5994 transitions. Word has length 21 [2021-04-15 02:36:02,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:02,289 INFO L480 AbstractCegarLoop]: Abstraction has 1958 states and 5994 transitions. [2021-04-15 02:36:02,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:02,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 5994 transitions. [2021-04-15 02:36:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:02,290 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:02,291 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:02,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41960 [2021-04-15 02:36:02,491 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:02,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:02,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1059877375, now seen corresponding path program 301 times [2021-04-15 02:36:02,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:02,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962332232] [2021-04-15 02:36:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:02,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962332232] [2021-04-15 02:36:02,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115256488] [2021-04-15 02:36:02,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:02,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:02,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:02,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:02,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:02,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040418479] [2021-04-15 02:36:02,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:02,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:02,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:02,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:02,677 INFO L87 Difference]: Start difference. First operand 1958 states and 5994 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:02,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:02,878 INFO L93 Difference]: Finished difference Result 2065 states and 6193 transitions. [2021-04-15 02:36:02,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:36:02,879 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:02,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:02,881 INFO L225 Difference]: With dead ends: 2065 [2021-04-15 02:36:02,881 INFO L226 Difference]: Without dead ends: 2053 [2021-04-15 02:36:02,882 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:36:02,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-04-15 02:36:02,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1958. [2021-04-15 02:36:02,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1957 states have (on average 3.061318344404701) internal successors, (5991), 1957 states have internal predecessors, (5991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 5991 transitions. [2021-04-15 02:36:02,903 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 5991 transitions. Word has length 21 [2021-04-15 02:36:02,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:02,903 INFO L480 AbstractCegarLoop]: Abstraction has 1958 states and 5991 transitions. [2021-04-15 02:36:02,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:02,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 5991 transitions. [2021-04-15 02:36:02,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:02,905 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:02,905 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:03,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41961 [2021-04-15 02:36:03,105 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:03,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:03,105 INFO L82 PathProgramCache]: Analyzing trace with hash 649187736, now seen corresponding path program 302 times [2021-04-15 02:36:03,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:03,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964357337] [2021-04-15 02:36:03,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:03,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964357337] [2021-04-15 02:36:03,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583328546] [2021-04-15 02:36:03,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:03,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:36:03,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:03,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:03,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:03,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:03,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:03,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468551903] [2021-04-15 02:36:03,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:03,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:03,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:03,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:03,292 INFO L87 Difference]: Start difference. First operand 1958 states and 5991 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:03,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:03,496 INFO L93 Difference]: Finished difference Result 2496 states and 7167 transitions. [2021-04-15 02:36:03,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:36:03,498 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:03,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:03,501 INFO L225 Difference]: With dead ends: 2496 [2021-04-15 02:36:03,501 INFO L226 Difference]: Without dead ends: 2496 [2021-04-15 02:36:03,501 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 152.7ms TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:36:03,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-04-15 02:36:03,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 1961. [2021-04-15 02:36:03,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 3.061224489795918) internal successors, (6000), 1960 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:03,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 6000 transitions. [2021-04-15 02:36:03,527 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 6000 transitions. Word has length 21 [2021-04-15 02:36:03,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:03,527 INFO L480 AbstractCegarLoop]: Abstraction has 1961 states and 6000 transitions. [2021-04-15 02:36:03,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:03,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 6000 transitions. [2021-04-15 02:36:03,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:03,529 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:03,529 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:03,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41962 [2021-04-15 02:36:03,729 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:03,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:03,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1454406011, now seen corresponding path program 303 times [2021-04-15 02:36:03,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:03,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493877635] [2021-04-15 02:36:03,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:36:03,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493877635] [2021-04-15 02:36:03,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738748941] [2021-04-15 02:36:03,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:03,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:36:03,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:03,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:03,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:36:03,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:03,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:36:03,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267141653] [2021-04-15 02:36:03,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:36:03,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:03,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:36:03,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:36:03,892 INFO L87 Difference]: Start difference. First operand 1961 states and 6000 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:04,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:04,010 INFO L93 Difference]: Finished difference Result 2213 states and 6489 transitions. [2021-04-15 02:36:04,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:36:04,011 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:04,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:04,014 INFO L225 Difference]: With dead ends: 2213 [2021-04-15 02:36:04,014 INFO L226 Difference]: Without dead ends: 2211 [2021-04-15 02:36:04,014 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:04,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-04-15 02:36:04,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1969. [2021-04-15 02:36:04,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.0523373983739837) internal successors, (6007), 1968 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6007 transitions. [2021-04-15 02:36:04,037 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6007 transitions. Word has length 21 [2021-04-15 02:36:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:04,037 INFO L480 AbstractCegarLoop]: Abstraction has 1969 states and 6007 transitions. [2021-04-15 02:36:04,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6007 transitions. [2021-04-15 02:36:04,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:04,039 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:04,039 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:04,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41963,312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:04,239 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:04,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:04,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1535536296, now seen corresponding path program 304 times [2021-04-15 02:36:04,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:04,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347349832] [2021-04-15 02:36:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:36:04,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347349832] [2021-04-15 02:36:04,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455442906] [2021-04-15 02:36:04,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:04,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:36:04,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:04,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:04,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:36:04,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:04,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:36:04,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277908419] [2021-04-15 02:36:04,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:36:04,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:04,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:36:04,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:36:04,378 INFO L87 Difference]: Start difference. First operand 1969 states and 6007 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:04,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:04,593 INFO L93 Difference]: Finished difference Result 2209 states and 6411 transitions. [2021-04-15 02:36:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:36:04,594 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:04,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:04,597 INFO L225 Difference]: With dead ends: 2209 [2021-04-15 02:36:04,597 INFO L226 Difference]: Without dead ends: 2207 [2021-04-15 02:36:04,598 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:36:04,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-04-15 02:36:04,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1981. [2021-04-15 02:36:04,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 3.051010101010101) internal successors, (6041), 1980 states have internal predecessors, (6041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 6041 transitions. [2021-04-15 02:36:04,620 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 6041 transitions. Word has length 21 [2021-04-15 02:36:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:04,620 INFO L480 AbstractCegarLoop]: Abstraction has 1981 states and 6041 transitions. [2021-04-15 02:36:04,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 6041 transitions. [2021-04-15 02:36:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:04,622 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:04,622 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:04,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41964,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:04,822 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:04,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:04,823 INFO L82 PathProgramCache]: Analyzing trace with hash 327009918, now seen corresponding path program 305 times [2021-04-15 02:36:04,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:04,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68456934] [2021-04-15 02:36:04,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:04,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68456934] [2021-04-15 02:36:04,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426544887] [2021-04-15 02:36:04,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:04,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:36:04,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:04,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:04,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:04,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:04,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:36:04,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093942709] [2021-04-15 02:36:04,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:36:04,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:04,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:36:04,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:36:04,998 INFO L87 Difference]: Start difference. First operand 1981 states and 6041 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:05,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:05,139 INFO L93 Difference]: Finished difference Result 2324 states and 6703 transitions. [2021-04-15 02:36:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:36:05,140 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:05,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:05,143 INFO L225 Difference]: With dead ends: 2324 [2021-04-15 02:36:05,143 INFO L226 Difference]: Without dead ends: 2324 [2021-04-15 02:36:05,144 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:05,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2021-04-15 02:36:05,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 1980. [2021-04-15 02:36:05,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.0505305709954524) internal successors, (6037), 1979 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:05,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6037 transitions. [2021-04-15 02:36:05,179 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6037 transitions. Word has length 21 [2021-04-15 02:36:05,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:05,179 INFO L480 AbstractCegarLoop]: Abstraction has 1980 states and 6037 transitions. [2021-04-15 02:36:05,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:05,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6037 transitions. [2021-04-15 02:36:05,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:05,181 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:05,181 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:05,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41965,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:05,381 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:05,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:05,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1275555135, now seen corresponding path program 306 times [2021-04-15 02:36:05,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:05,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63682957] [2021-04-15 02:36:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:05,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63682957] [2021-04-15 02:36:05,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303248648] [2021-04-15 02:36:05,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:05,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:36:05,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:05,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:05,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:05,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:05,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:05,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598297167] [2021-04-15 02:36:05,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:05,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:05,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:05,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:05,536 INFO L87 Difference]: Start difference. First operand 1980 states and 6037 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:05,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:05,731 INFO L93 Difference]: Finished difference Result 2132 states and 6310 transitions. [2021-04-15 02:36:05,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:36:05,731 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:05,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:05,734 INFO L225 Difference]: With dead ends: 2132 [2021-04-15 02:36:05,734 INFO L226 Difference]: Without dead ends: 2114 [2021-04-15 02:36:05,734 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:36:05,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-04-15 02:36:05,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1950. [2021-04-15 02:36:05,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1950 states, 1949 states have (on average 3.047716777834787) internal successors, (5940), 1949 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 5940 transitions. [2021-04-15 02:36:05,755 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 5940 transitions. Word has length 21 [2021-04-15 02:36:05,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:05,755 INFO L480 AbstractCegarLoop]: Abstraction has 1950 states and 5940 transitions. [2021-04-15 02:36:05,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:05,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 5940 transitions. [2021-04-15 02:36:05,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:05,757 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:05,757 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:05,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41966,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:05,957 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:05,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:05,958 INFO L82 PathProgramCache]: Analyzing trace with hash 864865496, now seen corresponding path program 307 times [2021-04-15 02:36:05,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:05,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821548931] [2021-04-15 02:36:05,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:06,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821548931] [2021-04-15 02:36:06,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415270726] [2021-04-15 02:36:06,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:06,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:06,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:06,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:06,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:06,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749492258] [2021-04-15 02:36:06,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:06,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:06,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:06,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:06,125 INFO L87 Difference]: Start difference. First operand 1950 states and 5940 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:06,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:06,277 INFO L93 Difference]: Finished difference Result 2430 states and 6974 transitions. [2021-04-15 02:36:06,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:36:06,278 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:06,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:06,281 INFO L225 Difference]: With dead ends: 2430 [2021-04-15 02:36:06,281 INFO L226 Difference]: Without dead ends: 2430 [2021-04-15 02:36:06,281 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:36:06,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2021-04-15 02:36:06,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 1953. [2021-04-15 02:36:06,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 3.0476434426229506) internal successors, (5949), 1952 states have internal predecessors, (5949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:06,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5949 transitions. [2021-04-15 02:36:06,305 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5949 transitions. Word has length 21 [2021-04-15 02:36:06,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:06,305 INFO L480 AbstractCegarLoop]: Abstraction has 1953 states and 5949 transitions. [2021-04-15 02:36:06,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5949 transitions. [2021-04-15 02:36:06,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:06,307 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:06,307 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:06,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41967,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:06,507 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:06,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:06,507 INFO L82 PathProgramCache]: Analyzing trace with hash 223475963, now seen corresponding path program 308 times [2021-04-15 02:36:06,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:06,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472736858] [2021-04-15 02:36:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:06,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472736858] [2021-04-15 02:36:06,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026952630] [2021-04-15 02:36:06,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:06,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:36:06,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:06,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:06,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:06,674 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:06,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:06,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:36:06,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186315913] [2021-04-15 02:36:06,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:06,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:06,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:06,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:06,674 INFO L87 Difference]: Start difference. First operand 1953 states and 5949 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:06,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:06,886 INFO L93 Difference]: Finished difference Result 2111 states and 6245 transitions. [2021-04-15 02:36:06,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:36:06,887 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:06,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:06,889 INFO L225 Difference]: With dead ends: 2111 [2021-04-15 02:36:06,889 INFO L226 Difference]: Without dead ends: 2103 [2021-04-15 02:36:06,890 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:36:06,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2021-04-15 02:36:06,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1953. [2021-04-15 02:36:06,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 3.045594262295082) internal successors, (5945), 1952 states have internal predecessors, (5945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5945 transitions. [2021-04-15 02:36:06,912 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5945 transitions. Word has length 21 [2021-04-15 02:36:06,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:06,912 INFO L480 AbstractCegarLoop]: Abstraction has 1953 states and 5945 transitions. [2021-04-15 02:36:06,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:06,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5945 transitions. [2021-04-15 02:36:06,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:06,914 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:06,914 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:07,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41968,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:07,114 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:07,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:07,115 INFO L82 PathProgramCache]: Analyzing trace with hash 358519230, now seen corresponding path program 309 times [2021-04-15 02:36:07,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:07,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094503521] [2021-04-15 02:36:07,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:07,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094503521] [2021-04-15 02:36:07,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81887541] [2021-04-15 02:36:07,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:07,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:36:07,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:07,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:07,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:07,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:07,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:36:07,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331603144] [2021-04-15 02:36:07,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:07,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:07,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:07,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:07,300 INFO L87 Difference]: Start difference. First operand 1953 states and 5945 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:07,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:07,549 INFO L93 Difference]: Finished difference Result 2622 states and 7467 transitions. [2021-04-15 02:36:07,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:36:07,550 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:07,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:07,553 INFO L225 Difference]: With dead ends: 2622 [2021-04-15 02:36:07,553 INFO L226 Difference]: Without dead ends: 2622 [2021-04-15 02:36:07,553 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:36:07,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-04-15 02:36:07,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 1843. [2021-04-15 02:36:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1842 states have (on average 3.03800217155266) internal successors, (5596), 1842 states have internal predecessors, (5596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 5596 transitions. [2021-04-15 02:36:07,576 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 5596 transitions. Word has length 21 [2021-04-15 02:36:07,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:07,576 INFO L480 AbstractCegarLoop]: Abstraction has 1843 states and 5596 transitions. [2021-04-15 02:36:07,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:07,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 5596 transitions. [2021-04-15 02:36:07,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:07,578 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:07,578 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:07,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41969,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:07,778 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:07,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:07,779 INFO L82 PathProgramCache]: Analyzing trace with hash -449518021, now seen corresponding path program 310 times [2021-04-15 02:36:07,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:07,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779228106] [2021-04-15 02:36:07,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:36:07,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779228106] [2021-04-15 02:36:07,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624813067] [2021-04-15 02:36:07,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:07,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:36:07,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:07,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:07,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:36:07,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:07,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:36:07,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202341691] [2021-04-15 02:36:07,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:36:07,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:07,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:36:07,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:36:07,953 INFO L87 Difference]: Start difference. First operand 1843 states and 5596 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:08,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:08,068 INFO L93 Difference]: Finished difference Result 2094 states and 6088 transitions. [2021-04-15 02:36:08,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:36:08,069 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:08,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:08,071 INFO L225 Difference]: With dead ends: 2094 [2021-04-15 02:36:08,071 INFO L226 Difference]: Without dead ends: 2092 [2021-04-15 02:36:08,072 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:08,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-04-15 02:36:08,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1844. [2021-04-15 02:36:08,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 3.0336408030385242) internal successors, (5591), 1843 states have internal predecessors, (5591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:08,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 5591 transitions. [2021-04-15 02:36:08,093 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 5591 transitions. Word has length 21 [2021-04-15 02:36:08,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:08,093 INFO L480 AbstractCegarLoop]: Abstraction has 1844 states and 5591 transitions. [2021-04-15 02:36:08,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:08,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 5591 transitions. [2021-04-15 02:36:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:08,095 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:08,095 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:08,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41970 [2021-04-15 02:36:08,295 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:08,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:08,295 INFO L82 PathProgramCache]: Analyzing trace with hash -368387736, now seen corresponding path program 311 times [2021-04-15 02:36:08,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:08,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014650661] [2021-04-15 02:36:08,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:36:08,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014650661] [2021-04-15 02:36:08,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070136184] [2021-04-15 02:36:08,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:08,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:36:08,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:08,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:08,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:36:08,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:08,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:36:08,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799879513] [2021-04-15 02:36:08,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:36:08,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:08,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:36:08,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:36:08,445 INFO L87 Difference]: Start difference. First operand 1844 states and 5591 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:08,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:08,660 INFO L93 Difference]: Finished difference Result 2057 states and 5918 transitions. [2021-04-15 02:36:08,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:36:08,661 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:08,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:08,664 INFO L225 Difference]: With dead ends: 2057 [2021-04-15 02:36:08,664 INFO L226 Difference]: Without dead ends: 2055 [2021-04-15 02:36:08,664 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:36:08,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-04-15 02:36:08,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 1844. [2021-04-15 02:36:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 3.030385241454151) internal successors, (5585), 1843 states have internal predecessors, (5585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:08,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 5585 transitions. [2021-04-15 02:36:08,684 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 5585 transitions. Word has length 21 [2021-04-15 02:36:08,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:08,684 INFO L480 AbstractCegarLoop]: Abstraction has 1844 states and 5585 transitions. [2021-04-15 02:36:08,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:08,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 5585 transitions. [2021-04-15 02:36:08,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:08,686 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:08,686 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:08,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41971 [2021-04-15 02:36:08,887 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:08,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:08,887 INFO L82 PathProgramCache]: Analyzing trace with hash -628368897, now seen corresponding path program 312 times [2021-04-15 02:36:08,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:08,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756569914] [2021-04-15 02:36:08,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:08,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756569914] [2021-04-15 02:36:08,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124770892] [2021-04-15 02:36:08,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:08,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:36:08,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:08,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:08,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:09,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:09,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:09,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32832721] [2021-04-15 02:36:09,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:09,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:09,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:09,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:09,082 INFO L87 Difference]: Start difference. First operand 1844 states and 5585 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:09,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:09,276 INFO L93 Difference]: Finished difference Result 1999 states and 5867 transitions. [2021-04-15 02:36:09,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:36:09,276 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:09,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:09,278 INFO L225 Difference]: With dead ends: 1999 [2021-04-15 02:36:09,278 INFO L226 Difference]: Without dead ends: 1985 [2021-04-15 02:36:09,278 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:36:09,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-04-15 02:36:09,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1816. [2021-04-15 02:36:09,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.0292011019283747) internal successors, (5498), 1815 states have internal predecessors, (5498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5498 transitions. [2021-04-15 02:36:09,296 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5498 transitions. Word has length 21 [2021-04-15 02:36:09,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:09,296 INFO L480 AbstractCegarLoop]: Abstraction has 1816 states and 5498 transitions. [2021-04-15 02:36:09,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:09,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5498 transitions. [2021-04-15 02:36:09,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:09,298 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:09,298 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:09,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41972 [2021-04-15 02:36:09,498 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:09,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:09,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1039058536, now seen corresponding path program 313 times [2021-04-15 02:36:09,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:09,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408000367] [2021-04-15 02:36:09,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:09,582 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:09,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408000367] [2021-04-15 02:36:09,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53705205] [2021-04-15 02:36:09,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:09,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:09,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:09,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:09,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:09,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331194256] [2021-04-15 02:36:09,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:09,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:09,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:09,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:09,672 INFO L87 Difference]: Start difference. First operand 1816 states and 5498 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:09,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:09,838 INFO L93 Difference]: Finished difference Result 2171 states and 6223 transitions. [2021-04-15 02:36:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:36:09,839 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:09,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:09,842 INFO L225 Difference]: With dead ends: 2171 [2021-04-15 02:36:09,842 INFO L226 Difference]: Without dead ends: 2171 [2021-04-15 02:36:09,842 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:36:09,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-04-15 02:36:09,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 1798. [2021-04-15 02:36:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1797 states have (on average 3.025598219254313) internal successors, (5437), 1797 states have internal predecessors, (5437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 5437 transitions. [2021-04-15 02:36:09,862 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 5437 transitions. Word has length 21 [2021-04-15 02:36:09,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:09,862 INFO L480 AbstractCegarLoop]: Abstraction has 1798 states and 5437 transitions. [2021-04-15 02:36:09,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:09,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 5437 transitions. [2021-04-15 02:36:09,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:09,864 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:09,864 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:10,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41973 [2021-04-15 02:36:10,065 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:10,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:10,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1680448069, now seen corresponding path program 314 times [2021-04-15 02:36:10,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:10,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722458407] [2021-04-15 02:36:10,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:10,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722458407] [2021-04-15 02:36:10,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263745561] [2021-04-15 02:36:10,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:10,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:36:10,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:10,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:10,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:10,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:10,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:36:10,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585798445] [2021-04-15 02:36:10,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:10,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:10,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:10,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:10,270 INFO L87 Difference]: Start difference. First operand 1798 states and 5437 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:10,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:10,519 INFO L93 Difference]: Finished difference Result 1973 states and 5763 transitions. [2021-04-15 02:36:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:36:10,520 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:10,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:10,523 INFO L225 Difference]: With dead ends: 1973 [2021-04-15 02:36:10,523 INFO L226 Difference]: Without dead ends: 1965 [2021-04-15 02:36:10,523 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 197.3ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:36:10,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-04-15 02:36:10,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1798. [2021-04-15 02:36:10,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1797 states have (on average 3.0211463550361715) internal successors, (5429), 1797 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:10,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 5429 transitions. [2021-04-15 02:36:10,543 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 5429 transitions. Word has length 21 [2021-04-15 02:36:10,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:10,543 INFO L480 AbstractCegarLoop]: Abstraction has 1798 states and 5429 transitions. [2021-04-15 02:36:10,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:10,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 5429 transitions. [2021-04-15 02:36:10,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:10,545 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:10,545 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:10,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41974,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:10,745 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:10,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:10,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1545404802, now seen corresponding path program 315 times [2021-04-15 02:36:10,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:10,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461187486] [2021-04-15 02:36:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:10,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461187486] [2021-04-15 02:36:10,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557745253] [2021-04-15 02:36:10,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:10,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:36:10,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:10,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:10,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:10,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:10,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:36:10,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222811509] [2021-04-15 02:36:10,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:10,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:10,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:10,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:10,938 INFO L87 Difference]: Start difference. First operand 1798 states and 5429 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:11,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:11,168 INFO L93 Difference]: Finished difference Result 2324 states and 6595 transitions. [2021-04-15 02:36:11,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:36:11,169 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:11,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:11,172 INFO L225 Difference]: With dead ends: 2324 [2021-04-15 02:36:11,172 INFO L226 Difference]: Without dead ends: 2324 [2021-04-15 02:36:11,172 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:36:11,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2021-04-15 02:36:11,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 1725. [2021-04-15 02:36:11,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 3.019141531322506) internal successors, (5205), 1724 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:11,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 5205 transitions. [2021-04-15 02:36:11,191 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 5205 transitions. Word has length 21 [2021-04-15 02:36:11,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:11,191 INFO L480 AbstractCegarLoop]: Abstraction has 1725 states and 5205 transitions. [2021-04-15 02:36:11,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:11,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 5205 transitions. [2021-04-15 02:36:11,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:11,192 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:11,192 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:11,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41975,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:11,393 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:11,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:11,393 INFO L82 PathProgramCache]: Analyzing trace with hash 64835967, now seen corresponding path program 316 times [2021-04-15 02:36:11,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:11,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97600339] [2021-04-15 02:36:11,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:11,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97600339] [2021-04-15 02:36:11,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856987625] [2021-04-15 02:36:11,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:11,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:36:11,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:11,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:11,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:11,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:11,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:36:11,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778507559] [2021-04-15 02:36:11,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:11,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:11,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:11,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:11,539 INFO L87 Difference]: Start difference. First operand 1725 states and 5205 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:11,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:11,756 INFO L93 Difference]: Finished difference Result 1981 states and 5745 transitions. [2021-04-15 02:36:11,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:36:11,757 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:11,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:11,759 INFO L225 Difference]: With dead ends: 1981 [2021-04-15 02:36:11,759 INFO L226 Difference]: Without dead ends: 1971 [2021-04-15 02:36:11,759 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:36:11,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-04-15 02:36:11,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1727. [2021-04-15 02:36:11,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 3.0162224797219004) internal successors, (5206), 1726 states have internal predecessors, (5206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:11,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 5206 transitions. [2021-04-15 02:36:11,779 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 5206 transitions. Word has length 21 [2021-04-15 02:36:11,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:11,779 INFO L480 AbstractCegarLoop]: Abstraction has 1727 states and 5206 transitions. [2021-04-15 02:36:11,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:11,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 5206 transitions. [2021-04-15 02:36:11,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:11,781 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:11,781 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:11,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41976,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:11,981 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:11,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:11,981 INFO L82 PathProgramCache]: Analyzing trace with hash -62269864, now seen corresponding path program 317 times [2021-04-15 02:36:11,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:11,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376419472] [2021-04-15 02:36:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:12,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376419472] [2021-04-15 02:36:12,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069276761] [2021-04-15 02:36:12,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:12,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:36:12,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:12,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:12,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:12,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:12,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:36:12,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784900874] [2021-04-15 02:36:12,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:12,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:12,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:12,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:12,179 INFO L87 Difference]: Start difference. First operand 1727 states and 5206 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:12,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:12,514 INFO L93 Difference]: Finished difference Result 3120 states and 8943 transitions. [2021-04-15 02:36:12,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:36:12,515 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:12,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:12,520 INFO L225 Difference]: With dead ends: 3120 [2021-04-15 02:36:12,520 INFO L226 Difference]: Without dead ends: 3120 [2021-04-15 02:36:12,520 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:36:12,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2021-04-15 02:36:12,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 1848. [2021-04-15 02:36:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.012452625879805) internal successors, (5564), 1847 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 5564 transitions. [2021-04-15 02:36:12,545 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 5564 transitions. Word has length 21 [2021-04-15 02:36:12,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:12,545 INFO L480 AbstractCegarLoop]: Abstraction has 1848 states and 5564 transitions. [2021-04-15 02:36:12,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:12,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 5564 transitions. [2021-04-15 02:36:12,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:12,547 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:12,547 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:12,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41977 [2021-04-15 02:36:12,747 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:12,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:12,748 INFO L82 PathProgramCache]: Analyzing trace with hash 658379131, now seen corresponding path program 318 times [2021-04-15 02:36:12,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:12,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256701503] [2021-04-15 02:36:12,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:36:12,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256701503] [2021-04-15 02:36:12,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450133556] [2021-04-15 02:36:12,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:12,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:36:12,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:12,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:12,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:36:12,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:12,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:36:12,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260346670] [2021-04-15 02:36:12,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:36:12,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:12,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:36:12,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:36:12,892 INFO L87 Difference]: Start difference. First operand 1848 states and 5564 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:12,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:12,967 INFO L93 Difference]: Finished difference Result 2112 states and 6071 transitions. [2021-04-15 02:36:12,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:36:12,968 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:12,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:12,970 INFO L225 Difference]: With dead ends: 2112 [2021-04-15 02:36:12,970 INFO L226 Difference]: Without dead ends: 2110 [2021-04-15 02:36:12,970 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:36:12,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-04-15 02:36:12,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1839. [2021-04-15 02:36:12,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1839 states, 1838 states have (on average 3.0087051142546244) internal successors, (5530), 1838 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:12,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 5530 transitions. [2021-04-15 02:36:12,992 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 5530 transitions. Word has length 21 [2021-04-15 02:36:12,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:12,992 INFO L480 AbstractCegarLoop]: Abstraction has 1839 states and 5530 transitions. [2021-04-15 02:36:12,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:12,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 5530 transitions. [2021-04-15 02:36:12,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:12,994 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:12,994 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:13,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41978,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:13,194 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:13,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:13,194 INFO L82 PathProgramCache]: Analyzing trace with hash 739509416, now seen corresponding path program 319 times [2021-04-15 02:36:13,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:13,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757428267] [2021-04-15 02:36:13,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:36:13,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757428267] [2021-04-15 02:36:13,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080947120] [2021-04-15 02:36:13,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:13,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:13,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:36:13,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:13,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:36:13,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213061197] [2021-04-15 02:36:13,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:36:13,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:13,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:36:13,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:36:13,346 INFO L87 Difference]: Start difference. First operand 1839 states and 5530 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:13,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:13,578 INFO L93 Difference]: Finished difference Result 2052 states and 5923 transitions. [2021-04-15 02:36:13,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:36:13,579 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:13,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:13,581 INFO L225 Difference]: With dead ends: 2052 [2021-04-15 02:36:13,581 INFO L226 Difference]: Without dead ends: 2050 [2021-04-15 02:36:13,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:36:13,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2021-04-15 02:36:13,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 1862. [2021-04-15 02:36:13,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1861 states have (on average 3.0112842557764643) internal successors, (5604), 1861 states have internal predecessors, (5604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:13,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 5604 transitions. [2021-04-15 02:36:13,602 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 5604 transitions. Word has length 21 [2021-04-15 02:36:13,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:13,602 INFO L480 AbstractCegarLoop]: Abstraction has 1862 states and 5604 transitions. [2021-04-15 02:36:13,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:13,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 5604 transitions. [2021-04-15 02:36:13,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:13,604 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:13,604 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:13,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41979,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:13,805 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:13,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:13,805 INFO L82 PathProgramCache]: Analyzing trace with hash 479528255, now seen corresponding path program 320 times [2021-04-15 02:36:13,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:13,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92171093] [2021-04-15 02:36:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:13,897 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:13,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92171093] [2021-04-15 02:36:13,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271498784] [2021-04-15 02:36:13,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:13,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:36:13,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:13,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:13,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:14,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:14,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:14,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89375154] [2021-04-15 02:36:14,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:14,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:14,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:14,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:14,011 INFO L87 Difference]: Start difference. First operand 1862 states and 5604 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:14,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:14,275 INFO L93 Difference]: Finished difference Result 2109 states and 6032 transitions. [2021-04-15 02:36:14,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:36:14,276 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:14,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:14,279 INFO L225 Difference]: With dead ends: 2109 [2021-04-15 02:36:14,279 INFO L226 Difference]: Without dead ends: 2089 [2021-04-15 02:36:14,279 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:36:14,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-04-15 02:36:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1826. [2021-04-15 02:36:14,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 2.9983561643835617) internal successors, (5472), 1825 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 5472 transitions. [2021-04-15 02:36:14,300 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 5472 transitions. Word has length 21 [2021-04-15 02:36:14,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:14,300 INFO L480 AbstractCegarLoop]: Abstraction has 1826 states and 5472 transitions. [2021-04-15 02:36:14,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 5472 transitions. [2021-04-15 02:36:14,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:14,302 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:14,302 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:14,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41980 [2021-04-15 02:36:14,502 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:14,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:14,503 INFO L82 PathProgramCache]: Analyzing trace with hash -572550917, now seen corresponding path program 321 times [2021-04-15 02:36:14,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:14,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806027169] [2021-04-15 02:36:14,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:14,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806027169] [2021-04-15 02:36:14,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778510823] [2021-04-15 02:36:14,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:14,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:36:14,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:14,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:14,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:14,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:14,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:36:14,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588338406] [2021-04-15 02:36:14,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:14,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:14,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:14,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:14,666 INFO L87 Difference]: Start difference. First operand 1826 states and 5472 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:14,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:14,971 INFO L93 Difference]: Finished difference Result 2012 states and 5813 transitions. [2021-04-15 02:36:14,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:36:14,972 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:14,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:14,974 INFO L225 Difference]: With dead ends: 2012 [2021-04-15 02:36:14,975 INFO L226 Difference]: Without dead ends: 1996 [2021-04-15 02:36:14,975 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:36:14,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2021-04-15 02:36:14,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1826. [2021-04-15 02:36:14,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 2.9917808219178084) internal successors, (5460), 1825 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:14,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 5460 transitions. [2021-04-15 02:36:14,995 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 5460 transitions. Word has length 21 [2021-04-15 02:36:14,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:14,995 INFO L480 AbstractCegarLoop]: Abstraction has 1826 states and 5460 transitions. [2021-04-15 02:36:14,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:14,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 5460 transitions. [2021-04-15 02:36:14,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:14,997 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:14,997 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:15,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41981 [2021-04-15 02:36:15,197 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:15,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:15,198 INFO L82 PathProgramCache]: Analyzing trace with hash -437507650, now seen corresponding path program 322 times [2021-04-15 02:36:15,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:15,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842293645] [2021-04-15 02:36:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:15,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842293645] [2021-04-15 02:36:15,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374940342] [2021-04-15 02:36:15,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:15,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:36:15,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:15,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:15,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:15,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:15,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:36:15,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975691659] [2021-04-15 02:36:15,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:15,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:15,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:15,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:15,388 INFO L87 Difference]: Start difference. First operand 1826 states and 5460 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:15,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:15,605 INFO L93 Difference]: Finished difference Result 2184 states and 6216 transitions. [2021-04-15 02:36:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:36:15,606 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:15,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:15,609 INFO L225 Difference]: With dead ends: 2184 [2021-04-15 02:36:15,609 INFO L226 Difference]: Without dead ends: 2184 [2021-04-15 02:36:15,609 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:36:15,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-04-15 02:36:15,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1787. [2021-04-15 02:36:15,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.98488241881299) internal successors, (5331), 1786 states have internal predecessors, (5331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:15,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 5331 transitions. [2021-04-15 02:36:15,630 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 5331 transitions. Word has length 21 [2021-04-15 02:36:15,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:15,630 INFO L480 AbstractCegarLoop]: Abstraction has 1787 states and 5331 transitions. [2021-04-15 02:36:15,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:15,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 5331 transitions. [2021-04-15 02:36:15,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:15,632 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:15,632 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:15,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41982 [2021-04-15 02:36:15,832 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:15,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:15,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1172733119, now seen corresponding path program 323 times [2021-04-15 02:36:15,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:15,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280927417] [2021-04-15 02:36:15,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:15,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280927417] [2021-04-15 02:36:15,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933650480] [2021-04-15 02:36:15,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:15,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:36:15,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:15,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:15,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:15,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:15,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:36:15,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573463771] [2021-04-15 02:36:15,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:15,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:15,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:15,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:15,989 INFO L87 Difference]: Start difference. First operand 1787 states and 5331 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:16,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:16,187 INFO L93 Difference]: Finished difference Result 2056 states and 5899 transitions. [2021-04-15 02:36:16,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:36:16,188 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:16,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:16,191 INFO L225 Difference]: With dead ends: 2056 [2021-04-15 02:36:16,191 INFO L226 Difference]: Without dead ends: 2046 [2021-04-15 02:36:16,191 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:36:16,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-04-15 02:36:16,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1787. [2021-04-15 02:36:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.984322508398656) internal successors, (5330), 1786 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:16,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 5330 transitions. [2021-04-15 02:36:16,211 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 5330 transitions. Word has length 21 [2021-04-15 02:36:16,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:16,211 INFO L480 AbstractCegarLoop]: Abstraction has 1787 states and 5330 transitions. [2021-04-15 02:36:16,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 5330 transitions. [2021-04-15 02:36:16,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:16,213 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:16,213 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:16,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41983 [2021-04-15 02:36:16,419 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:16,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:16,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1045627288, now seen corresponding path program 324 times [2021-04-15 02:36:16,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:16,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699248712] [2021-04-15 02:36:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:16,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699248712] [2021-04-15 02:36:16,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941484282] [2021-04-15 02:36:16,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:16,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:36:16,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:16,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:16,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:16,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:16,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:36:16,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689058606] [2021-04-15 02:36:16,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:16,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:16,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:16,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:16,620 INFO L87 Difference]: Start difference. First operand 1787 states and 5330 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:16,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:16,888 INFO L93 Difference]: Finished difference Result 3285 states and 9471 transitions. [2021-04-15 02:36:16,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:36:16,889 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:16,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:16,892 INFO L225 Difference]: With dead ends: 3285 [2021-04-15 02:36:16,892 INFO L226 Difference]: Without dead ends: 3285 [2021-04-15 02:36:16,892 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:36:16,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3285 states. [2021-04-15 02:36:16,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3285 to 1833. [2021-04-15 02:36:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 2.9683406113537116) internal successors, (5438), 1832 states have internal predecessors, (5438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:16,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 5438 transitions. [2021-04-15 02:36:16,916 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 5438 transitions. Word has length 21 [2021-04-15 02:36:16,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:16,916 INFO L480 AbstractCegarLoop]: Abstraction has 1833 states and 5438 transitions. [2021-04-15 02:36:16,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:16,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 5438 transitions. [2021-04-15 02:36:16,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:16,918 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:16,918 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:17,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41984 [2021-04-15 02:36:17,118 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:17,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:17,119 INFO L82 PathProgramCache]: Analyzing trace with hash -558036613, now seen corresponding path program 325 times [2021-04-15 02:36:17,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:17,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087900277] [2021-04-15 02:36:17,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:17,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087900277] [2021-04-15 02:36:17,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183339981] [2021-04-15 02:36:17,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:17,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:17,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:17,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:17,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:36:17,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865128819] [2021-04-15 02:36:17,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:17,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:17,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:17,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:17,317 INFO L87 Difference]: Start difference. First operand 1833 states and 5438 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:17,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:17,543 INFO L93 Difference]: Finished difference Result 2116 states and 6032 transitions. [2021-04-15 02:36:17,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:36:17,544 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:17,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:17,547 INFO L225 Difference]: With dead ends: 2116 [2021-04-15 02:36:17,547 INFO L226 Difference]: Without dead ends: 2104 [2021-04-15 02:36:17,547 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:36:17,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-04-15 02:36:17,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1835. [2021-04-15 02:36:17,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1835 states, 1834 states have (on average 2.966194111232279) internal successors, (5440), 1834 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 5440 transitions. [2021-04-15 02:36:17,567 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 5440 transitions. Word has length 21 [2021-04-15 02:36:17,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:17,567 INFO L480 AbstractCegarLoop]: Abstraction has 1835 states and 5440 transitions. [2021-04-15 02:36:17,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:17,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 5440 transitions. [2021-04-15 02:36:17,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:17,569 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:17,569 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:17,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41985,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:17,769 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:17,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:17,770 INFO L82 PathProgramCache]: Analyzing trace with hash -221829890, now seen corresponding path program 326 times [2021-04-15 02:36:17,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:17,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920820067] [2021-04-15 02:36:17,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:17,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920820067] [2021-04-15 02:36:17,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366784996] [2021-04-15 02:36:17,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:17,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:36:17,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:17,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:17,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:17,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:17,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:36:17,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100817784] [2021-04-15 02:36:17,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:17,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:17,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:17,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:17,966 INFO L87 Difference]: Start difference. First operand 1835 states and 5440 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:18,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:18,356 INFO L93 Difference]: Finished difference Result 3310 states and 9407 transitions. [2021-04-15 02:36:18,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:36:18,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:18,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:18,360 INFO L225 Difference]: With dead ends: 3310 [2021-04-15 02:36:18,360 INFO L226 Difference]: Without dead ends: 3310 [2021-04-15 02:36:18,361 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 303.6ms TimeCoverageRelationStatistics Valid=336, Invalid=656, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:36:18,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-04-15 02:36:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 1933. [2021-04-15 02:36:18,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 2.961697722567288) internal successors, (5722), 1932 states have internal predecessors, (5722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:18,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 5722 transitions. [2021-04-15 02:36:18,385 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 5722 transitions. Word has length 21 [2021-04-15 02:36:18,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:18,386 INFO L480 AbstractCegarLoop]: Abstraction has 1933 states and 5722 transitions. [2021-04-15 02:36:18,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:18,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 5722 transitions. [2021-04-15 02:36:18,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:18,387 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:18,387 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:18,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41986,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:18,588 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:18,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:18,588 INFO L82 PathProgramCache]: Analyzing trace with hash 496894629, now seen corresponding path program 327 times [2021-04-15 02:36:18,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:18,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844257214] [2021-04-15 02:36:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:18,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844257214] [2021-04-15 02:36:18,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701098192] [2021-04-15 02:36:18,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:18,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:36:18,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:18,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:18,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:36:18,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:18,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:36:18,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211288190] [2021-04-15 02:36:18,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:36:18,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:18,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:36:18,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:36:18,763 INFO L87 Difference]: Start difference. First operand 1933 states and 5722 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:18,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:18,917 INFO L93 Difference]: Finished difference Result 2075 states and 6000 transitions. [2021-04-15 02:36:18,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:36:18,918 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:18,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:18,921 INFO L225 Difference]: With dead ends: 2075 [2021-04-15 02:36:18,921 INFO L226 Difference]: Without dead ends: 2075 [2021-04-15 02:36:18,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:36:18,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-04-15 02:36:18,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1939. [2021-04-15 02:36:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.961816305469556) internal successors, (5740), 1938 states have internal predecessors, (5740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5740 transitions. [2021-04-15 02:36:18,942 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5740 transitions. Word has length 21 [2021-04-15 02:36:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:18,943 INFO L480 AbstractCegarLoop]: Abstraction has 1939 states and 5740 transitions. [2021-04-15 02:36:18,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5740 transitions. [2021-04-15 02:36:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:18,944 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:18,944 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:19,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41987,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:19,145 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:19,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:19,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1283033832, now seen corresponding path program 328 times [2021-04-15 02:36:19,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:19,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166176827] [2021-04-15 02:36:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:19,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166176827] [2021-04-15 02:36:19,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554173989] [2021-04-15 02:36:19,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:19,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:36:19,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:19,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:19,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:36:19,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:19,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:36:19,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824120846] [2021-04-15 02:36:19,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:36:19,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:19,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:36:19,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:36:19,281 INFO L87 Difference]: Start difference. First operand 1939 states and 5740 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:19,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:19,524 INFO L93 Difference]: Finished difference Result 2139 states and 6051 transitions. [2021-04-15 02:36:19,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:36:19,525 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:19,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:19,528 INFO L225 Difference]: With dead ends: 2139 [2021-04-15 02:36:19,528 INFO L226 Difference]: Without dead ends: 2135 [2021-04-15 02:36:19,529 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:36:19,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-04-15 02:36:19,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1939. [2021-04-15 02:36:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.961300309597523) internal successors, (5739), 1938 states have internal predecessors, (5739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:19,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5739 transitions. [2021-04-15 02:36:19,551 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5739 transitions. Word has length 21 [2021-04-15 02:36:19,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:19,551 INFO L480 AbstractCegarLoop]: Abstraction has 1939 states and 5739 transitions. [2021-04-15 02:36:19,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:19,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5739 transitions. [2021-04-15 02:36:19,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:19,553 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:19,553 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:19,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41988,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:19,753 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:19,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:19,753 INFO L82 PathProgramCache]: Analyzing trace with hash 49909311, now seen corresponding path program 329 times [2021-04-15 02:36:19,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:19,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847956358] [2021-04-15 02:36:19,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:19,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847956358] [2021-04-15 02:36:19,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503122532] [2021-04-15 02:36:19,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:19,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:36:19,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:19,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:19,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:19,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:19,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:19,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093327492] [2021-04-15 02:36:19,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:19,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:19,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:19,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:19,941 INFO L87 Difference]: Start difference. First operand 1939 states and 5739 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:20,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:20,125 INFO L93 Difference]: Finished difference Result 2180 states and 6261 transitions. [2021-04-15 02:36:20,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:36:20,126 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:20,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:20,129 INFO L225 Difference]: With dead ends: 2180 [2021-04-15 02:36:20,129 INFO L226 Difference]: Without dead ends: 2160 [2021-04-15 02:36:20,129 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:36:20,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2021-04-15 02:36:20,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1939. [2021-04-15 02:36:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.960268317853457) internal successors, (5737), 1938 states have internal predecessors, (5737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:20,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5737 transitions. [2021-04-15 02:36:20,150 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5737 transitions. Word has length 21 [2021-04-15 02:36:20,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:20,150 INFO L480 AbstractCegarLoop]: Abstraction has 1939 states and 5737 transitions. [2021-04-15 02:36:20,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:20,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5737 transitions. [2021-04-15 02:36:20,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:20,152 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:20,152 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:20,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41989 [2021-04-15 02:36:20,352 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:20,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:20,353 INFO L82 PathProgramCache]: Analyzing trace with hash -77196520, now seen corresponding path program 330 times [2021-04-15 02:36:20,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:20,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388351059] [2021-04-15 02:36:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:20,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388351059] [2021-04-15 02:36:20,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097927690] [2021-04-15 02:36:20,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:20,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:36:20,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:20,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:20,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:20,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:20,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:20,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236525817] [2021-04-15 02:36:20,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:20,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:20,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:20,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:20,544 INFO L87 Difference]: Start difference. First operand 1939 states and 5737 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:20,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:20,889 INFO L93 Difference]: Finished difference Result 2753 states and 7805 transitions. [2021-04-15 02:36:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:36:20,890 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:20,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:20,895 INFO L225 Difference]: With dead ends: 2753 [2021-04-15 02:36:20,895 INFO L226 Difference]: Without dead ends: 2753 [2021-04-15 02:36:20,895 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 266.0ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:36:20,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2021-04-15 02:36:20,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 2090. [2021-04-15 02:36:20,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 2089 states have (on average 2.9664911440880806) internal successors, (6197), 2089 states have internal predecessors, (6197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:20,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 6197 transitions. [2021-04-15 02:36:20,929 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 6197 transitions. Word has length 21 [2021-04-15 02:36:20,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:20,929 INFO L480 AbstractCegarLoop]: Abstraction has 2090 states and 6197 transitions. [2021-04-15 02:36:20,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:20,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 6197 transitions. [2021-04-15 02:36:20,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:20,931 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:20,931 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:21,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41990 [2021-04-15 02:36:21,131 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:21,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:21,132 INFO L82 PathProgramCache]: Analyzing trace with hash -586557543, now seen corresponding path program 331 times [2021-04-15 02:36:21,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:21,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050535642] [2021-04-15 02:36:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:21,205 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:21,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050535642] [2021-04-15 02:36:21,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916956111] [2021-04-15 02:36:21,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:21,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:21,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:21,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:21,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:36:21,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628304787] [2021-04-15 02:36:21,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:21,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:21,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:21,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:21,271 INFO L87 Difference]: Start difference. First operand 2090 states and 6197 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:21,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:21,542 INFO L93 Difference]: Finished difference Result 2406 states and 6903 transitions. [2021-04-15 02:36:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:36:21,543 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:21,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:21,546 INFO L225 Difference]: With dead ends: 2406 [2021-04-15 02:36:21,546 INFO L226 Difference]: Without dead ends: 2386 [2021-04-15 02:36:21,546 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:36:21,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-04-15 02:36:21,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 2090. [2021-04-15 02:36:21,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 2089 states have (on average 2.9621828626136906) internal successors, (6188), 2089 states have internal predecessors, (6188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 6188 transitions. [2021-04-15 02:36:21,569 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 6188 transitions. Word has length 21 [2021-04-15 02:36:21,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:21,569 INFO L480 AbstractCegarLoop]: Abstraction has 2090 states and 6188 transitions. [2021-04-15 02:36:21,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:21,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 6188 transitions. [2021-04-15 02:36:21,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:21,571 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:21,571 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:21,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41991 [2021-04-15 02:36:21,771 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:21,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:21,772 INFO L82 PathProgramCache]: Analyzing trace with hash -713663374, now seen corresponding path program 332 times [2021-04-15 02:36:21,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:21,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548869540] [2021-04-15 02:36:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:21,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548869540] [2021-04-15 02:36:21,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800359292] [2021-04-15 02:36:21,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:21,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:36:21,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:21,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:21,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:21,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:21,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:36:21,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308560725] [2021-04-15 02:36:21,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:21,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:21,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:21,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:21,981 INFO L87 Difference]: Start difference. First operand 2090 states and 6188 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:22,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:22,275 INFO L93 Difference]: Finished difference Result 2696 states and 7663 transitions. [2021-04-15 02:36:22,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:36:22,276 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:22,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:22,280 INFO L225 Difference]: With dead ends: 2696 [2021-04-15 02:36:22,280 INFO L226 Difference]: Without dead ends: 2696 [2021-04-15 02:36:22,280 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:36:22,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-04-15 02:36:22,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 1928. [2021-04-15 02:36:22,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 2.9740529320186817) internal successors, (5731), 1927 states have internal predecessors, (5731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:22,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 5731 transitions. [2021-04-15 02:36:22,304 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 5731 transitions. Word has length 21 [2021-04-15 02:36:22,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:22,305 INFO L480 AbstractCegarLoop]: Abstraction has 1928 states and 5731 transitions. [2021-04-15 02:36:22,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:22,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 5731 transitions. [2021-04-15 02:36:22,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:22,306 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:22,306 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:22,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41992 [2021-04-15 02:36:22,507 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:22,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:22,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1977640021, now seen corresponding path program 333 times [2021-04-15 02:36:22,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:22,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883551284] [2021-04-15 02:36:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:22,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883551284] [2021-04-15 02:36:22,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234903415] [2021-04-15 02:36:22,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:22,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:36:22,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:22,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:22,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:22,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:22,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:36:22,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367207683] [2021-04-15 02:36:22,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:22,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:22,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:22,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:22,671 INFO L87 Difference]: Start difference. First operand 1928 states and 5731 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:22,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:22,899 INFO L93 Difference]: Finished difference Result 2299 states and 6540 transitions. [2021-04-15 02:36:22,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:36:22,900 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:22,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:22,903 INFO L225 Difference]: With dead ends: 2299 [2021-04-15 02:36:22,903 INFO L226 Difference]: Without dead ends: 2287 [2021-04-15 02:36:22,903 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:36:22,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-04-15 02:36:22,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1939. [2021-04-15 02:36:22,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.9669762641898867) internal successors, (5750), 1938 states have internal predecessors, (5750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:22,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5750 transitions. [2021-04-15 02:36:22,926 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5750 transitions. Word has length 21 [2021-04-15 02:36:22,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:22,927 INFO L480 AbstractCegarLoop]: Abstraction has 1939 states and 5750 transitions. [2021-04-15 02:36:22,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:22,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5750 transitions. [2021-04-15 02:36:22,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:22,928 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:22,928 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:23,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41993,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:23,129 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:23,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:23,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1981120552, now seen corresponding path program 334 times [2021-04-15 02:36:23,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:23,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483897961] [2021-04-15 02:36:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:23,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483897961] [2021-04-15 02:36:23,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185275747] [2021-04-15 02:36:23,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:23,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:36:23,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:23,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:23,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:23,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:23,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:36:23,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462090557] [2021-04-15 02:36:23,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:23,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:23,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:23,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:23,305 INFO L87 Difference]: Start difference. First operand 1939 states and 5750 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:23,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:23,682 INFO L93 Difference]: Finished difference Result 3078 states and 8725 transitions. [2021-04-15 02:36:23,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:36:23,684 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:23,687 INFO L225 Difference]: With dead ends: 3078 [2021-04-15 02:36:23,688 INFO L226 Difference]: Without dead ends: 3078 [2021-04-15 02:36:23,688 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 311.8ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:36:23,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-04-15 02:36:23,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 1869. [2021-04-15 02:36:23,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 2.962526766595289) internal successors, (5534), 1868 states have internal predecessors, (5534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 5534 transitions. [2021-04-15 02:36:23,713 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 5534 transitions. Word has length 21 [2021-04-15 02:36:23,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:23,713 INFO L480 AbstractCegarLoop]: Abstraction has 1869 states and 5534 transitions. [2021-04-15 02:36:23,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:23,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 5534 transitions. [2021-04-15 02:36:23,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:23,715 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:23,715 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:23,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41994 [2021-04-15 02:36:23,916 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:23,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:23,916 INFO L82 PathProgramCache]: Analyzing trace with hash 643452475, now seen corresponding path program 335 times [2021-04-15 02:36:23,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:23,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853576661] [2021-04-15 02:36:23,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:23,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853576661] [2021-04-15 02:36:23,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724599035] [2021-04-15 02:36:23,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:23,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:36:23,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:23,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:24,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:36:24,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:24,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:36:24,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238146881] [2021-04-15 02:36:24,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:36:24,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:24,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:36:24,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:36:24,054 INFO L87 Difference]: Start difference. First operand 1869 states and 5534 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:24,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:24,138 INFO L93 Difference]: Finished difference Result 2189 states and 6149 transitions. [2021-04-15 02:36:24,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:36:24,138 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:24,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:24,140 INFO L225 Difference]: With dead ends: 2189 [2021-04-15 02:36:24,140 INFO L226 Difference]: Without dead ends: 2189 [2021-04-15 02:36:24,141 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:36:24,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2021-04-15 02:36:24,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 1893. [2021-04-15 02:36:24,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 2.973572938689218) internal successors, (5626), 1892 states have internal predecessors, (5626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 5626 transitions. [2021-04-15 02:36:24,159 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 5626 transitions. Word has length 21 [2021-04-15 02:36:24,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:24,159 INFO L480 AbstractCegarLoop]: Abstraction has 1893 states and 5626 transitions. [2021-04-15 02:36:24,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:24,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 5626 transitions. [2021-04-15 02:36:24,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:24,160 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:24,160 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:24,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41995,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:24,361 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:24,361 INFO L82 PathProgramCache]: Analyzing trace with hash 724582760, now seen corresponding path program 336 times [2021-04-15 02:36:24,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:24,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595374612] [2021-04-15 02:36:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:24,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595374612] [2021-04-15 02:36:24,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862334036] [2021-04-15 02:36:24,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:24,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:36:24,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:24,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:24,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:36:24,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:24,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:36:24,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063834327] [2021-04-15 02:36:24,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:36:24,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:24,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:36:24,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:36:24,499 INFO L87 Difference]: Start difference. First operand 1893 states and 5626 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:24,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:24,684 INFO L93 Difference]: Finished difference Result 2064 states and 5907 transitions. [2021-04-15 02:36:24,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:36:24,685 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:24,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:24,687 INFO L225 Difference]: With dead ends: 2064 [2021-04-15 02:36:24,687 INFO L226 Difference]: Without dead ends: 2062 [2021-04-15 02:36:24,687 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:36:24,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-04-15 02:36:24,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1904. [2021-04-15 02:36:24,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1903 states have (on average 2.975302154492906) internal successors, (5662), 1903 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:24,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 5662 transitions. [2021-04-15 02:36:24,727 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 5662 transitions. Word has length 21 [2021-04-15 02:36:24,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:24,727 INFO L480 AbstractCegarLoop]: Abstraction has 1904 states and 5662 transitions. [2021-04-15 02:36:24,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:24,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 5662 transitions. [2021-04-15 02:36:24,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:24,729 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:24,729 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:24,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41996,345 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:24,929 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:24,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:24,930 INFO L82 PathProgramCache]: Analyzing trace with hash -587477573, now seen corresponding path program 337 times [2021-04-15 02:36:24,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:24,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815038476] [2021-04-15 02:36:24,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:25,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815038476] [2021-04-15 02:36:25,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010817663] [2021-04-15 02:36:25,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:25,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:25,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:25,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:25,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:36:25,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354453489] [2021-04-15 02:36:25,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:25,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:25,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:25,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:25,133 INFO L87 Difference]: Start difference. First operand 1904 states and 5662 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:25,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:25,440 INFO L93 Difference]: Finished difference Result 2199 states and 6178 transitions. [2021-04-15 02:36:25,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:36:25,441 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:25,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:25,444 INFO L225 Difference]: With dead ends: 2199 [2021-04-15 02:36:25,444 INFO L226 Difference]: Without dead ends: 2169 [2021-04-15 02:36:25,444 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 222.9ms TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:36:25,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-04-15 02:36:25,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1904. [2021-04-15 02:36:25,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1903 states have (on average 2.9642669469259064) internal successors, (5641), 1903 states have internal predecessors, (5641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:25,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 5641 transitions. [2021-04-15 02:36:25,466 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 5641 transitions. Word has length 21 [2021-04-15 02:36:25,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:25,466 INFO L480 AbstractCegarLoop]: Abstraction has 1904 states and 5641 transitions. [2021-04-15 02:36:25,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:25,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 5641 transitions. [2021-04-15 02:36:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:25,468 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:25,468 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:25,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41997,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:25,668 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:25,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:25,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1157806463, now seen corresponding path program 338 times [2021-04-15 02:36:25,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:25,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442216648] [2021-04-15 02:36:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:25,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442216648] [2021-04-15 02:36:25,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219769191] [2021-04-15 02:36:25,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:25,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:36:25,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:25,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:25,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:25,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:25,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:25,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337455489] [2021-04-15 02:36:25,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:25,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:25,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:25,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:25,816 INFO L87 Difference]: Start difference. First operand 1904 states and 5641 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:26,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:26,112 INFO L93 Difference]: Finished difference Result 2131 states and 6054 transitions. [2021-04-15 02:36:26,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:36:26,113 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:26,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:26,115 INFO L225 Difference]: With dead ends: 2131 [2021-04-15 02:36:26,116 INFO L226 Difference]: Without dead ends: 2111 [2021-04-15 02:36:26,116 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 212.0ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:36:26,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-04-15 02:36:26,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1906. [2021-04-15 02:36:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 2.95748031496063) internal successors, (5634), 1905 states have internal predecessors, (5634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:26,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 5634 transitions. [2021-04-15 02:36:26,136 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 5634 transitions. Word has length 21 [2021-04-15 02:36:26,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:26,136 INFO L480 AbstractCegarLoop]: Abstraction has 1906 states and 5634 transitions. [2021-04-15 02:36:26,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:26,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 5634 transitions. [2021-04-15 02:36:26,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:26,138 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:26,138 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:26,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41998,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:26,339 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:26,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:26,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1030700632, now seen corresponding path program 339 times [2021-04-15 02:36:26,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:26,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53732931] [2021-04-15 02:36:26,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:26,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53732931] [2021-04-15 02:36:26,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129443629] [2021-04-15 02:36:26,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:26,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:36:26,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:26,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:26,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:26,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:26,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:26,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729822030] [2021-04-15 02:36:26,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:26,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:26,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:26,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:26,587 INFO L87 Difference]: Start difference. First operand 1906 states and 5634 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:26,845 INFO L93 Difference]: Finished difference Result 2236 states and 6295 transitions. [2021-04-15 02:36:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:36:26,846 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:26,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:26,849 INFO L225 Difference]: With dead ends: 2236 [2021-04-15 02:36:26,849 INFO L226 Difference]: Without dead ends: 2236 [2021-04-15 02:36:26,849 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:36:26,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-04-15 02:36:26,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1396. [2021-04-15 02:36:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 1395 states have (on average 2.8982078853046596) internal successors, (4043), 1395 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 4043 transitions. [2021-04-15 02:36:26,866 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 4043 transitions. Word has length 21 [2021-04-15 02:36:26,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:26,866 INFO L480 AbstractCegarLoop]: Abstraction has 1396 states and 4043 transitions. [2021-04-15 02:36:26,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 4043 transitions. [2021-04-15 02:36:26,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:26,867 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:26,867 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:27,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41999,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:27,067 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:27,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:27,068 INFO L82 PathProgramCache]: Analyzing trace with hash -572963269, now seen corresponding path program 340 times [2021-04-15 02:36:27,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:27,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028537540] [2021-04-15 02:36:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:27,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028537540] [2021-04-15 02:36:27,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221317037] [2021-04-15 02:36:27,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:27,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:36:27,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:27,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:27,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:27,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:27,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:27,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738144158] [2021-04-15 02:36:27,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:27,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:27,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:27,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:27,271 INFO L87 Difference]: Start difference. First operand 1396 states and 4043 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:27,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:27,488 INFO L93 Difference]: Finished difference Result 1832 states and 5001 transitions. [2021-04-15 02:36:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:36:27,490 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:27,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:27,492 INFO L225 Difference]: With dead ends: 1832 [2021-04-15 02:36:27,492 INFO L226 Difference]: Without dead ends: 1820 [2021-04-15 02:36:27,492 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 176.8ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:36:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2021-04-15 02:36:27,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1398. [2021-04-15 02:36:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.8976377952755907) internal successors, (4048), 1397 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4048 transitions. [2021-04-15 02:36:27,508 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4048 transitions. Word has length 21 [2021-04-15 02:36:27,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:27,509 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 4048 transitions. [2021-04-15 02:36:27,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:27,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4048 transitions. [2021-04-15 02:36:27,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:27,510 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:27,510 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:27,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42000,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:27,710 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:27,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:27,711 INFO L82 PathProgramCache]: Analyzing trace with hash -236756546, now seen corresponding path program 341 times [2021-04-15 02:36:27,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:27,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055118265] [2021-04-15 02:36:27,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:27,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055118265] [2021-04-15 02:36:27,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978998572] [2021-04-15 02:36:27,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:27,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:36:27,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:27,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:27,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:27,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:27,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:27,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927579329] [2021-04-15 02:36:27,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:27,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:27,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:27,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:27,889 INFO L87 Difference]: Start difference. First operand 1398 states and 4048 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:28,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:28,218 INFO L93 Difference]: Finished difference Result 2345 states and 6466 transitions. [2021-04-15 02:36:28,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:36:28,219 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:28,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:28,221 INFO L225 Difference]: With dead ends: 2345 [2021-04-15 02:36:28,221 INFO L226 Difference]: Without dead ends: 2345 [2021-04-15 02:36:28,221 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 276.6ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:36:28,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-04-15 02:36:28,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 1680. [2021-04-15 02:36:28,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 2.92078618225134) internal successors, (4904), 1679 states have internal predecessors, (4904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:28,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 4904 transitions. [2021-04-15 02:36:28,239 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 4904 transitions. Word has length 21 [2021-04-15 02:36:28,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:28,239 INFO L480 AbstractCegarLoop]: Abstraction has 1680 states and 4904 transitions. [2021-04-15 02:36:28,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:28,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 4904 transitions. [2021-04-15 02:36:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:28,241 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:28,241 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:28,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42001 [2021-04-15 02:36:28,441 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:28,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:28,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1607749887, now seen corresponding path program 342 times [2021-04-15 02:36:28,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:28,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020856191] [2021-04-15 02:36:28,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:28,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020856191] [2021-04-15 02:36:28,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667766699] [2021-04-15 02:36:28,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:28,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:36:28,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:28,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:28,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:28,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:28,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:28,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099199643] [2021-04-15 02:36:28,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:28,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:28,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:28,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:28,657 INFO L87 Difference]: Start difference. First operand 1680 states and 4904 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:28,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:28,851 INFO L93 Difference]: Finished difference Result 2117 states and 5870 transitions. [2021-04-15 02:36:28,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:36:28,852 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:28,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:28,854 INFO L225 Difference]: With dead ends: 2117 [2021-04-15 02:36:28,854 INFO L226 Difference]: Without dead ends: 2103 [2021-04-15 02:36:28,854 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:36:28,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2021-04-15 02:36:28,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1695. [2021-04-15 02:36:28,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 2.9126328217237307) internal successors, (4934), 1694 states have internal predecessors, (4934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:28,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 4934 transitions. [2021-04-15 02:36:28,873 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 4934 transitions. Word has length 21 [2021-04-15 02:36:28,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:28,873 INFO L480 AbstractCegarLoop]: Abstraction has 1695 states and 4934 transitions. [2021-04-15 02:36:28,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:28,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 4934 transitions. [2021-04-15 02:36:28,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:28,875 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:28,875 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:29,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42002 [2021-04-15 02:36:29,075 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:29,076 INFO L82 PathProgramCache]: Analyzing trace with hash -873223400, now seen corresponding path program 343 times [2021-04-15 02:36:29,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:29,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16904670] [2021-04-15 02:36:29,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:29,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16904670] [2021-04-15 02:36:29,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639718641] [2021-04-15 02:36:29,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:29,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:29,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:29,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:29,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:29,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475837077] [2021-04-15 02:36:29,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:29,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:29,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:29,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:29,269 INFO L87 Difference]: Start difference. First operand 1695 states and 4934 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:29,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:29,666 INFO L93 Difference]: Finished difference Result 2871 states and 7976 transitions. [2021-04-15 02:36:29,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:36:29,667 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:29,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:29,669 INFO L225 Difference]: With dead ends: 2871 [2021-04-15 02:36:29,670 INFO L226 Difference]: Without dead ends: 2871 [2021-04-15 02:36:29,670 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 337.1ms TimeCoverageRelationStatistics Valid=445, Invalid=887, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:36:29,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-04-15 02:36:29,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2029. [2021-04-15 02:36:29,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 2.9225838264299804) internal successors, (5927), 2028 states have internal predecessors, (5927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 5927 transitions. [2021-04-15 02:36:29,693 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 5927 transitions. Word has length 21 [2021-04-15 02:36:29,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:29,694 INFO L480 AbstractCegarLoop]: Abstraction has 2029 states and 5927 transitions. [2021-04-15 02:36:29,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:29,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 5927 transitions. [2021-04-15 02:36:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:29,695 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:29,695 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:29,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42003,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:29,896 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:29,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:29,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1793458955, now seen corresponding path program 344 times [2021-04-15 02:36:29,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:29,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802641960] [2021-04-15 02:36:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:29,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802641960] [2021-04-15 02:36:29,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467428160] [2021-04-15 02:36:29,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:29,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:36:29,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:29,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:29,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:30,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:30,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:30,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009829567] [2021-04-15 02:36:30,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:30,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:30,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:30,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:30,068 INFO L87 Difference]: Start difference. First operand 2029 states and 5927 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:30,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:30,207 INFO L93 Difference]: Finished difference Result 2314 states and 6501 transitions. [2021-04-15 02:36:30,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:36:30,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:30,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:30,211 INFO L225 Difference]: With dead ends: 2314 [2021-04-15 02:36:30,211 INFO L226 Difference]: Without dead ends: 2314 [2021-04-15 02:36:30,211 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:36:30,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-04-15 02:36:30,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2078. [2021-04-15 02:36:30,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2077 states have (on average 2.934520943668753) internal successors, (6095), 2077 states have internal predecessors, (6095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:30,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 6095 transitions. [2021-04-15 02:36:30,241 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 6095 transitions. Word has length 21 [2021-04-15 02:36:30,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:30,241 INFO L480 AbstractCegarLoop]: Abstraction has 2078 states and 6095 transitions. [2021-04-15 02:36:30,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:30,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 6095 transitions. [2021-04-15 02:36:30,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:30,243 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:30,243 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:30,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42004 [2021-04-15 02:36:30,444 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:30,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:30,444 INFO L82 PathProgramCache]: Analyzing trace with hash 13530494, now seen corresponding path program 345 times [2021-04-15 02:36:30,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:30,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119977957] [2021-04-15 02:36:30,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:30,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119977957] [2021-04-15 02:36:30,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843637707] [2021-04-15 02:36:30,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:30,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:36:30,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:30,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:30,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:30,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:30,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:30,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36828514] [2021-04-15 02:36:30,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:30,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:30,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:30,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:30,632 INFO L87 Difference]: Start difference. First operand 2078 states and 6095 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:30,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:30,990 INFO L93 Difference]: Finished difference Result 2345 states and 6555 transitions. [2021-04-15 02:36:30,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:36:30,991 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:30,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:30,994 INFO L225 Difference]: With dead ends: 2345 [2021-04-15 02:36:30,994 INFO L226 Difference]: Without dead ends: 2341 [2021-04-15 02:36:30,994 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:36:30,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2021-04-15 02:36:31,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 2097. [2021-04-15 02:36:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2096 states have (on average 2.940362595419847) internal successors, (6163), 2096 states have internal predecessors, (6163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:31,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 6163 transitions. [2021-04-15 02:36:31,018 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 6163 transitions. Word has length 21 [2021-04-15 02:36:31,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:31,018 INFO L480 AbstractCegarLoop]: Abstraction has 2097 states and 6163 transitions. [2021-04-15 02:36:31,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:31,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 6163 transitions. [2021-04-15 02:36:31,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:31,020 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:31,020 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:31,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42005 [2021-04-15 02:36:31,220 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:31,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:31,221 INFO L82 PathProgramCache]: Analyzing trace with hash -2115307227, now seen corresponding path program 346 times [2021-04-15 02:36:31,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:31,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21252193] [2021-04-15 02:36:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:31,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21252193] [2021-04-15 02:36:31,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605263189] [2021-04-15 02:36:31,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:31,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:36:31,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:31,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:31,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:31,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:31,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:36:31,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984144396] [2021-04-15 02:36:31,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:36:31,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:31,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:36:31,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:36:31,402 INFO L87 Difference]: Start difference. First operand 2097 states and 6163 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:31,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:31,650 INFO L93 Difference]: Finished difference Result 2290 states and 6497 transitions. [2021-04-15 02:36:31,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:36:31,651 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:31,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:31,654 INFO L225 Difference]: With dead ends: 2290 [2021-04-15 02:36:31,654 INFO L226 Difference]: Without dead ends: 2288 [2021-04-15 02:36:31,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 169.4ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:36:31,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2288 states. [2021-04-15 02:36:31,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2288 to 2097. [2021-04-15 02:36:31,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2096 states have (on average 2.939885496183206) internal successors, (6162), 2096 states have internal predecessors, (6162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:31,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 6162 transitions. [2021-04-15 02:36:31,679 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 6162 transitions. Word has length 21 [2021-04-15 02:36:31,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:31,679 INFO L480 AbstractCegarLoop]: Abstraction has 2097 states and 6162 transitions. [2021-04-15 02:36:31,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:31,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 6162 transitions. [2021-04-15 02:36:31,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:31,681 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:31,681 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:31,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42006 [2021-04-15 02:36:31,885 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:31,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:31,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1518396286, now seen corresponding path program 347 times [2021-04-15 02:36:31,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:31,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866240794] [2021-04-15 02:36:31,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:31,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866240794] [2021-04-15 02:36:31,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859179493] [2021-04-15 02:36:31,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:31,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:36:31,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:31,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:31,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:32,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:32,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:36:32,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016837749] [2021-04-15 02:36:32,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:36:32,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:32,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:36:32,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:36:32,055 INFO L87 Difference]: Start difference. First operand 2097 states and 6162 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:32,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:32,187 INFO L93 Difference]: Finished difference Result 2399 states and 6708 transitions. [2021-04-15 02:36:32,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:36:32,188 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:32,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:32,191 INFO L225 Difference]: With dead ends: 2399 [2021-04-15 02:36:32,191 INFO L226 Difference]: Without dead ends: 2399 [2021-04-15 02:36:32,191 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:32,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2021-04-15 02:36:32,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2087. [2021-04-15 02:36:32,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 2.934803451581975) internal successors, (6122), 2086 states have internal predecessors, (6122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:32,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 6122 transitions. [2021-04-15 02:36:32,217 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 6122 transitions. Word has length 21 [2021-04-15 02:36:32,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:32,217 INFO L480 AbstractCegarLoop]: Abstraction has 2087 states and 6122 transitions. [2021-04-15 02:36:32,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:32,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 6122 transitions. [2021-04-15 02:36:32,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:32,219 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:32,219 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:32,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42007,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:32,423 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:32,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:32,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1020762949, now seen corresponding path program 348 times [2021-04-15 02:36:32,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:32,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581648881] [2021-04-15 02:36:32,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:32,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581648881] [2021-04-15 02:36:32,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997614895] [2021-04-15 02:36:32,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:32,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:36:32,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:32,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:32,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:32,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:32,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:36:32,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268839462] [2021-04-15 02:36:32,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:32,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:32,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:32,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:32,594 INFO L87 Difference]: Start difference. First operand 2087 states and 6122 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:32,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:32,773 INFO L93 Difference]: Finished difference Result 2394 states and 6802 transitions. [2021-04-15 02:36:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:36:32,774 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:32,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:32,777 INFO L225 Difference]: With dead ends: 2394 [2021-04-15 02:36:32,777 INFO L226 Difference]: Without dead ends: 2382 [2021-04-15 02:36:32,777 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:36:32,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-04-15 02:36:32,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2087. [2021-04-15 02:36:32,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 2.9338446788111217) internal successors, (6120), 2086 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:32,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 6120 transitions. [2021-04-15 02:36:32,802 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 6120 transitions. Word has length 21 [2021-04-15 02:36:32,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:32,802 INFO L480 AbstractCegarLoop]: Abstraction has 2087 states and 6120 transitions. [2021-04-15 02:36:32,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:32,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 6120 transitions. [2021-04-15 02:36:32,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:32,804 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:32,804 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:33,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42008,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:33,004 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:33,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:33,004 INFO L82 PathProgramCache]: Analyzing trace with hash -684556226, now seen corresponding path program 349 times [2021-04-15 02:36:33,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:33,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661992123] [2021-04-15 02:36:33,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:33,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661992123] [2021-04-15 02:36:33,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974507763] [2021-04-15 02:36:33,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:33,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:33,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:33,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:33,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:36:33,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060774977] [2021-04-15 02:36:33,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:33,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:33,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:33,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:33,226 INFO L87 Difference]: Start difference. First operand 2087 states and 6120 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:33,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:33,657 INFO L93 Difference]: Finished difference Result 2726 states and 7651 transitions. [2021-04-15 02:36:33,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:36:33,658 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:33,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:33,661 INFO L225 Difference]: With dead ends: 2726 [2021-04-15 02:36:33,661 INFO L226 Difference]: Without dead ends: 2726 [2021-04-15 02:36:33,662 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 348.7ms TimeCoverageRelationStatistics Valid=316, Invalid=614, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:36:33,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-04-15 02:36:33,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2204. [2021-04-15 02:36:33,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 2.938719927371766) internal successors, (6474), 2203 states have internal predecessors, (6474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 6474 transitions. [2021-04-15 02:36:33,688 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 6474 transitions. Word has length 21 [2021-04-15 02:36:33,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:33,688 INFO L480 AbstractCegarLoop]: Abstraction has 2204 states and 6474 transitions. [2021-04-15 02:36:33,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:33,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 6474 transitions. [2021-04-15 02:36:33,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:33,690 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:33,690 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:33,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42009,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:33,891 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:33,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:33,891 INFO L82 PathProgramCache]: Analyzing trace with hash 723601057, now seen corresponding path program 350 times [2021-04-15 02:36:33,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:33,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623868160] [2021-04-15 02:36:33,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:33,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623868160] [2021-04-15 02:36:33,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045606279] [2021-04-15 02:36:33,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:34,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:36:34,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:34,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:34,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:34,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:34,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:34,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214215061] [2021-04-15 02:36:34,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:34,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:34,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:34,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:34,106 INFO L87 Difference]: Start difference. First operand 2204 states and 6474 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:34,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:34,492 INFO L93 Difference]: Finished difference Result 2582 states and 7346 transitions. [2021-04-15 02:36:34,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:36:34,494 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:34,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:34,497 INFO L225 Difference]: With dead ends: 2582 [2021-04-15 02:36:34,497 INFO L226 Difference]: Without dead ends: 2570 [2021-04-15 02:36:34,497 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:36:34,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2021-04-15 02:36:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2204. [2021-04-15 02:36:34,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 2.9355424421243757) internal successors, (6467), 2203 states have internal predecessors, (6467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:34,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 6467 transitions. [2021-04-15 02:36:34,524 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 6467 transitions. Word has length 21 [2021-04-15 02:36:34,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:34,524 INFO L480 AbstractCegarLoop]: Abstraction has 2204 states and 6467 transitions. [2021-04-15 02:36:34,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:34,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 6467 transitions. [2021-04-15 02:36:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:34,526 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:34,526 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:34,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42010 [2021-04-15 02:36:34,726 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:34,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1059807780, now seen corresponding path program 351 times [2021-04-15 02:36:34,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:34,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582626000] [2021-04-15 02:36:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:34,810 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:34,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582626000] [2021-04-15 02:36:34,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609918406] [2021-04-15 02:36:34,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:34,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:36:34,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:34,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:34,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:34,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:34,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:34,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913883815] [2021-04-15 02:36:34,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:34,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:34,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:34,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:34,913 INFO L87 Difference]: Start difference. First operand 2204 states and 6467 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:35,246 INFO L93 Difference]: Finished difference Result 2679 states and 7569 transitions. [2021-04-15 02:36:35,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:36:35,248 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:35,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:35,251 INFO L225 Difference]: With dead ends: 2679 [2021-04-15 02:36:35,251 INFO L226 Difference]: Without dead ends: 2679 [2021-04-15 02:36:35,251 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:36:35,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2021-04-15 02:36:35,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 1537. [2021-04-15 02:36:35,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 2.9095052083333335) internal successors, (4469), 1536 states have internal predecessors, (4469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:35,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 4469 transitions. [2021-04-15 02:36:35,275 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 4469 transitions. Word has length 21 [2021-04-15 02:36:35,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:35,275 INFO L480 AbstractCegarLoop]: Abstraction has 1537 states and 4469 transitions. [2021-04-15 02:36:35,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 4469 transitions. [2021-04-15 02:36:35,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:35,276 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:35,276 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:35,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42011,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:35,477 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:35,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:35,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1390653083, now seen corresponding path program 352 times [2021-04-15 02:36:35,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:35,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439463207] [2021-04-15 02:36:35,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:35,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439463207] [2021-04-15 02:36:35,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688528619] [2021-04-15 02:36:35,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:35,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:36:35,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:35,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:35,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:35,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:35,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:35,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137572749] [2021-04-15 02:36:35,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:35,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:35,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:35,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:35,662 INFO L87 Difference]: Start difference. First operand 1537 states and 4469 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:35,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:35,868 INFO L93 Difference]: Finished difference Result 2028 states and 5565 transitions. [2021-04-15 02:36:35,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:36:35,869 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:35,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:35,872 INFO L225 Difference]: With dead ends: 2028 [2021-04-15 02:36:35,872 INFO L226 Difference]: Without dead ends: 2014 [2021-04-15 02:36:35,872 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:36:35,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-04-15 02:36:35,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1554. [2021-04-15 02:36:35,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 2.900193174500966) internal successors, (4504), 1553 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:35,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 4504 transitions. [2021-04-15 02:36:35,890 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 4504 transitions. Word has length 21 [2021-04-15 02:36:35,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:35,890 INFO L480 AbstractCegarLoop]: Abstraction has 1554 states and 4504 transitions. [2021-04-15 02:36:35,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:35,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 4504 transitions. [2021-04-15 02:36:35,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:35,891 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:35,891 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:36,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42012 [2021-04-15 02:36:36,092 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:36,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:36,092 INFO L82 PathProgramCache]: Analyzing trace with hash 423340926, now seen corresponding path program 353 times [2021-04-15 02:36:36,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:36,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835983927] [2021-04-15 02:36:36,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:36,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835983927] [2021-04-15 02:36:36,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012449822] [2021-04-15 02:36:36,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:36,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:36:36,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:36,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:36,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:36,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:36,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:36,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586237930] [2021-04-15 02:36:36,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:36,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:36,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:36,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:36,255 INFO L87 Difference]: Start difference. First operand 1554 states and 4504 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:36,726 INFO L93 Difference]: Finished difference Result 2336 states and 6414 transitions. [2021-04-15 02:36:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:36:36,727 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:36,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:36,729 INFO L225 Difference]: With dead ends: 2336 [2021-04-15 02:36:36,729 INFO L226 Difference]: Without dead ends: 2336 [2021-04-15 02:36:36,729 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 347.7ms TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:36:36,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-04-15 02:36:36,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1497. [2021-04-15 02:36:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 2.8970588235294117) internal successors, (4334), 1496 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 4334 transitions. [2021-04-15 02:36:36,745 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 4334 transitions. Word has length 21 [2021-04-15 02:36:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:36,745 INFO L480 AbstractCegarLoop]: Abstraction has 1497 states and 4334 transitions. [2021-04-15 02:36:36,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:36,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 4334 transitions. [2021-04-15 02:36:36,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:36,747 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:36,747 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:36,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42013,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:36,947 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:36,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:36,947 INFO L82 PathProgramCache]: Analyzing trace with hash 180726139, now seen corresponding path program 354 times [2021-04-15 02:36:36,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:36,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135416831] [2021-04-15 02:36:36,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:37,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135416831] [2021-04-15 02:36:37,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942171546] [2021-04-15 02:36:37,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:37,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:36:37,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:37,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:37,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:37,135 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:37,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:37,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:36:37,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639913506] [2021-04-15 02:36:37,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:36:37,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:37,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:36:37,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:36:37,136 INFO L87 Difference]: Start difference. First operand 1497 states and 4334 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:37,272 INFO L93 Difference]: Finished difference Result 2050 states and 5598 transitions. [2021-04-15 02:36:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:36:37,273 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:37,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:37,276 INFO L225 Difference]: With dead ends: 2050 [2021-04-15 02:36:37,276 INFO L226 Difference]: Without dead ends: 2050 [2021-04-15 02:36:37,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:37,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2021-04-15 02:36:37,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 1687. [2021-04-15 02:36:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 2.9395017793594307) internal successors, (4956), 1686 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 4956 transitions. [2021-04-15 02:36:37,296 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 4956 transitions. Word has length 21 [2021-04-15 02:36:37,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:37,296 INFO L480 AbstractCegarLoop]: Abstraction has 1687 states and 4956 transitions. [2021-04-15 02:36:37,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:37,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 4956 transitions. [2021-04-15 02:36:37,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:37,297 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:37,297 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:37,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42014 [2021-04-15 02:36:37,498 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:37,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:37,498 INFO L82 PathProgramCache]: Analyzing trace with hash 261856424, now seen corresponding path program 355 times [2021-04-15 02:36:37,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:37,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545960100] [2021-04-15 02:36:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:37,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545960100] [2021-04-15 02:36:37,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767170475] [2021-04-15 02:36:37,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:37,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:37,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:37,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:37,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:36:37,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986203506] [2021-04-15 02:36:37,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:36:37,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:37,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:36:37,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:36:37,668 INFO L87 Difference]: Start difference. First operand 1687 states and 4956 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:37,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:37,954 INFO L93 Difference]: Finished difference Result 1917 states and 5347 transitions. [2021-04-15 02:36:37,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:36:37,955 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:37,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:37,958 INFO L225 Difference]: With dead ends: 1917 [2021-04-15 02:36:37,958 INFO L226 Difference]: Without dead ends: 1915 [2021-04-15 02:36:37,958 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:36:37,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2021-04-15 02:36:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1706. [2021-04-15 02:36:37,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1705 states have (on average 2.947800586510264) internal successors, (5026), 1705 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:37,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 5026 transitions. [2021-04-15 02:36:37,976 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 5026 transitions. Word has length 21 [2021-04-15 02:36:37,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:37,977 INFO L480 AbstractCegarLoop]: Abstraction has 1706 states and 5026 transitions. [2021-04-15 02:36:37,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:37,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 5026 transitions. [2021-04-15 02:36:37,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:37,978 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:37,978 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:38,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42015 [2021-04-15 02:36:38,179 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:38,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:38,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1775453631, now seen corresponding path program 356 times [2021-04-15 02:36:38,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:38,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417690502] [2021-04-15 02:36:38,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:38,263 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:38,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417690502] [2021-04-15 02:36:38,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084181050] [2021-04-15 02:36:38,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:38,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:36:38,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:38,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:38,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:38,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:38,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:36:38,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36904994] [2021-04-15 02:36:38,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:36:38,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:38,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:36:38,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:36:38,356 INFO L87 Difference]: Start difference. First operand 1706 states and 5026 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:38,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:38,645 INFO L93 Difference]: Finished difference Result 2043 states and 5618 transitions. [2021-04-15 02:36:38,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:36:38,646 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:38,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:38,649 INFO L225 Difference]: With dead ends: 2043 [2021-04-15 02:36:38,649 INFO L226 Difference]: Without dead ends: 2041 [2021-04-15 02:36:38,649 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:36:38,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-04-15 02:36:38,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1706. [2021-04-15 02:36:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1705 states have (on average 2.9472140762463344) internal successors, (5025), 1705 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:38,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 5025 transitions. [2021-04-15 02:36:38,668 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 5025 transitions. Word has length 21 [2021-04-15 02:36:38,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:38,668 INFO L480 AbstractCegarLoop]: Abstraction has 1706 states and 5025 transitions. [2021-04-15 02:36:38,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:38,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 5025 transitions. [2021-04-15 02:36:38,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:38,670 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:38,670 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:38,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42016 [2021-04-15 02:36:38,870 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:38,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:38,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1114189848, now seen corresponding path program 357 times [2021-04-15 02:36:38,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:38,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921041236] [2021-04-15 02:36:38,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:38,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921041236] [2021-04-15 02:36:38,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404949371] [2021-04-15 02:36:38,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:38,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:36:38,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:38,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:38,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:38,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:38,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:36:39,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254516855] [2021-04-15 02:36:39,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:36:39,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:39,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:36:39,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:36:39,000 INFO L87 Difference]: Start difference. First operand 1706 states and 5025 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:39,183 INFO L93 Difference]: Finished difference Result 1983 states and 5517 transitions. [2021-04-15 02:36:39,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:36:39,184 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:39,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:39,186 INFO L225 Difference]: With dead ends: 1983 [2021-04-15 02:36:39,186 INFO L226 Difference]: Without dead ends: 1983 [2021-04-15 02:36:39,186 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:36:39,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-04-15 02:36:39,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1686. [2021-04-15 02:36:39,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 2.940652818991098) internal successors, (4955), 1685 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 4955 transitions. [2021-04-15 02:36:39,205 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 4955 transitions. Word has length 21 [2021-04-15 02:36:39,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:39,205 INFO L480 AbstractCegarLoop]: Abstraction has 1686 states and 4955 transitions. [2021-04-15 02:36:39,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:39,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 4955 transitions. [2021-04-15 02:36:39,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:39,206 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:39,206 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:39,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42017 [2021-04-15 02:36:39,407 INFO L428 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:39,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:39,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1875263, now seen corresponding path program 358 times [2021-04-15 02:36:39,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:39,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196154096] [2021-04-15 02:36:39,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:39,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196154096] [2021-04-15 02:36:39,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766776393] [2021-04-15 02:36:39,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:39,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:36:39,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:39,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:39,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:39,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:39,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:39,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933590107] [2021-04-15 02:36:39,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:39,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:39,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:39,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:39,590 INFO L87 Difference]: Start difference. First operand 1686 states and 4955 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:39,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:39,876 INFO L93 Difference]: Finished difference Result 2027 states and 5611 transitions. [2021-04-15 02:36:39,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:36:39,877 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:39,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:39,879 INFO L225 Difference]: With dead ends: 2027 [2021-04-15 02:36:39,880 INFO L226 Difference]: Without dead ends: 2017 [2021-04-15 02:36:39,880 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 191.5ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:36:39,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-04-15 02:36:39,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1712. [2021-04-15 02:36:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1711 states have (on average 2.950905902980713) internal successors, (5049), 1711 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 5049 transitions. [2021-04-15 02:36:39,899 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 5049 transitions. Word has length 21 [2021-04-15 02:36:39,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:39,899 INFO L480 AbstractCegarLoop]: Abstraction has 1712 states and 5049 transitions. [2021-04-15 02:36:39,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:39,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 5049 transitions. [2021-04-15 02:36:39,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:39,901 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:39,901 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:40,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42018,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:40,101 INFO L428 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:40,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:40,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1050203909, now seen corresponding path program 359 times [2021-04-15 02:36:40,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:40,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407686407] [2021-04-15 02:36:40,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:40,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407686407] [2021-04-15 02:36:40,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653812094] [2021-04-15 02:36:40,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:40,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:36:40,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:40,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:40,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:40,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:40,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:36:40,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422627435] [2021-04-15 02:36:40,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:40,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:40,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:40,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:40,272 INFO L87 Difference]: Start difference. First operand 1712 states and 5049 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:40,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:40,576 INFO L93 Difference]: Finished difference Result 2043 states and 5643 transitions. [2021-04-15 02:36:40,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:36:40,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:40,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:40,580 INFO L225 Difference]: With dead ends: 2043 [2021-04-15 02:36:40,580 INFO L226 Difference]: Without dead ends: 2035 [2021-04-15 02:36:40,580 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:36:40,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-04-15 02:36:40,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1712. [2021-04-15 02:36:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1711 states have (on average 2.9485680888369377) internal successors, (5045), 1711 states have internal predecessors, (5045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:40,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 5045 transitions. [2021-04-15 02:36:40,600 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 5045 transitions. Word has length 21 [2021-04-15 02:36:40,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:40,601 INFO L480 AbstractCegarLoop]: Abstraction has 1712 states and 5045 transitions. [2021-04-15 02:36:40,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:40,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 5045 transitions. [2021-04-15 02:36:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:40,602 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:40,602 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:40,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42019,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:40,803 INFO L428 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:40,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:40,803 INFO L82 PathProgramCache]: Analyzing trace with hash -915160642, now seen corresponding path program 360 times [2021-04-15 02:36:40,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:40,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283914213] [2021-04-15 02:36:40,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:40,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283914213] [2021-04-15 02:36:40,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795301054] [2021-04-15 02:36:40,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:40,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:36:40,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:40,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:40,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:40,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:40,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:36:40,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374435502] [2021-04-15 02:36:40,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:40,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:40,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:40,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:40,973 INFO L87 Difference]: Start difference. First operand 1712 states and 5045 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:41,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:41,208 INFO L93 Difference]: Finished difference Result 1974 states and 5556 transitions. [2021-04-15 02:36:41,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:36:41,209 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:41,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:41,212 INFO L225 Difference]: With dead ends: 1974 [2021-04-15 02:36:41,212 INFO L226 Difference]: Without dead ends: 1972 [2021-04-15 02:36:41,212 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:36:41,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-04-15 02:36:41,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1649. [2021-04-15 02:36:41,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 2.941140776699029) internal successors, (4847), 1648 states have internal predecessors, (4847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:41,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 4847 transitions. [2021-04-15 02:36:41,230 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 4847 transitions. Word has length 21 [2021-04-15 02:36:41,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:41,230 INFO L480 AbstractCegarLoop]: Abstraction has 1649 states and 4847 transitions. [2021-04-15 02:36:41,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:41,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 4847 transitions. [2021-04-15 02:36:41,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:41,231 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:41,232 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:41,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42020,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:41,432 INFO L428 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:41,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:41,432 INFO L82 PathProgramCache]: Analyzing trace with hash 695080127, now seen corresponding path program 361 times [2021-04-15 02:36:41,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:41,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861129131] [2021-04-15 02:36:41,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:41,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861129131] [2021-04-15 02:36:41,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002195882] [2021-04-15 02:36:41,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:41,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:41,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:41,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:41,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:36:41,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168182393] [2021-04-15 02:36:41,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:41,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:41,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:41,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:41,630 INFO L87 Difference]: Start difference. First operand 1649 states and 4847 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:41,878 INFO L93 Difference]: Finished difference Result 2312 states and 6363 transitions. [2021-04-15 02:36:41,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:36:41,879 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:41,882 INFO L225 Difference]: With dead ends: 2312 [2021-04-15 02:36:41,882 INFO L226 Difference]: Without dead ends: 2292 [2021-04-15 02:36:41,882 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:36:41,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-04-15 02:36:41,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 1649. [2021-04-15 02:36:41,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 2.9387135922330097) internal successors, (4843), 1648 states have internal predecessors, (4843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:41,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 4843 transitions. [2021-04-15 02:36:41,903 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 4843 transitions. Word has length 21 [2021-04-15 02:36:41,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:41,903 INFO L480 AbstractCegarLoop]: Abstraction has 1649 states and 4843 transitions. [2021-04-15 02:36:41,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:41,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 4843 transitions. [2021-04-15 02:36:41,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:41,904 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:41,904 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:42,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42021,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:42,105 INFO L428 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:42,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:42,105 INFO L82 PathProgramCache]: Analyzing trace with hash 567974296, now seen corresponding path program 362 times [2021-04-15 02:36:42,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:42,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630838736] [2021-04-15 02:36:42,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:42,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630838736] [2021-04-15 02:36:42,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331321158] [2021-04-15 02:36:42,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:42,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:36:42,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:42,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:42,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:36:42,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:42,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:36:42,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960995490] [2021-04-15 02:36:42,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:42,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:42,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:42,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:42,285 INFO L87 Difference]: Start difference. First operand 1649 states and 4843 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:42,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:42,444 INFO L93 Difference]: Finished difference Result 2145 states and 6148 transitions. [2021-04-15 02:36:42,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:36:42,445 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:42,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:42,448 INFO L225 Difference]: With dead ends: 2145 [2021-04-15 02:36:42,448 INFO L226 Difference]: Without dead ends: 2145 [2021-04-15 02:36:42,448 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:36:42,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-04-15 02:36:42,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 2006. [2021-04-15 02:36:42,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 2.9401496259351623) internal successors, (5895), 2005 states have internal predecessors, (5895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:42,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 5895 transitions. [2021-04-15 02:36:42,469 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 5895 transitions. Word has length 21 [2021-04-15 02:36:42,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:42,469 INFO L480 AbstractCegarLoop]: Abstraction has 2006 states and 5895 transitions. [2021-04-15 02:36:42,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:42,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 5895 transitions. [2021-04-15 02:36:42,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:42,470 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:42,470 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:42,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42022 [2021-04-15 02:36:42,671 INFO L428 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:42,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:42,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1035689605, now seen corresponding path program 363 times [2021-04-15 02:36:42,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:42,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956961399] [2021-04-15 02:36:42,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:42,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956961399] [2021-04-15 02:36:42,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613165481] [2021-04-15 02:36:42,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:42,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:36:42,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:42,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:42,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:42,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:42,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:42,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110414524] [2021-04-15 02:36:42,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:42,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:42,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:42,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:42,829 INFO L87 Difference]: Start difference. First operand 2006 states and 5895 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:43,058 INFO L93 Difference]: Finished difference Result 2656 states and 7407 transitions. [2021-04-15 02:36:43,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:36:43,059 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:43,062 INFO L225 Difference]: With dead ends: 2656 [2021-04-15 02:36:43,062 INFO L226 Difference]: Without dead ends: 2644 [2021-04-15 02:36:43,063 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:36:43,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-04-15 02:36:43,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2027. [2021-04-15 02:36:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 2.9387956564659428) internal successors, (5954), 2026 states have internal predecessors, (5954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:43,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 5954 transitions. [2021-04-15 02:36:43,088 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 5954 transitions. Word has length 21 [2021-04-15 02:36:43,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:43,088 INFO L480 AbstractCegarLoop]: Abstraction has 2027 states and 5954 transitions. [2021-04-15 02:36:43,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 5954 transitions. [2021-04-15 02:36:43,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:43,090 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:43,090 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:43,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42023,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:43,290 INFO L428 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:43,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:43,290 INFO L82 PathProgramCache]: Analyzing trace with hash -699482882, now seen corresponding path program 364 times [2021-04-15 02:36:43,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:43,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263121043] [2021-04-15 02:36:43,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:43,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263121043] [2021-04-15 02:36:43,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024607903] [2021-04-15 02:36:43,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:43,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:36:43,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:43,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:43,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:43,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:43,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:43,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544448135] [2021-04-15 02:36:43,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:43,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:43,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:43,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:43,474 INFO L87 Difference]: Start difference. First operand 2027 states and 5954 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:43,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:43,712 INFO L93 Difference]: Finished difference Result 2251 states and 6357 transitions. [2021-04-15 02:36:43,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:36:43,713 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:43,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:43,715 INFO L225 Difference]: With dead ends: 2251 [2021-04-15 02:36:43,715 INFO L226 Difference]: Without dead ends: 2251 [2021-04-15 02:36:43,715 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:36:43,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-04-15 02:36:43,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1996. [2021-04-15 02:36:43,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 2.937844611528822) internal successors, (5861), 1995 states have internal predecessors, (5861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:43,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 5861 transitions. [2021-04-15 02:36:43,734 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 5861 transitions. Word has length 21 [2021-04-15 02:36:43,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:43,734 INFO L480 AbstractCegarLoop]: Abstraction has 1996 states and 5861 transitions. [2021-04-15 02:36:43,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:43,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 5861 transitions. [2021-04-15 02:36:43,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:43,735 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:43,735 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:43,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42024 [2021-04-15 02:36:43,936 INFO L428 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:43,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:43,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1145023551, now seen corresponding path program 365 times [2021-04-15 02:36:43,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:43,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25904921] [2021-04-15 02:36:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:44,069 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:44,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25904921] [2021-04-15 02:36:44,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133033200] [2021-04-15 02:36:44,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:44,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:36:44,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:44,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:44,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:44,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:44,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:44,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934167] [2021-04-15 02:36:44,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:44,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:44,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:44,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:44,181 INFO L87 Difference]: Start difference. First operand 1996 states and 5861 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:44,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:44,355 INFO L93 Difference]: Finished difference Result 2310 states and 6557 transitions. [2021-04-15 02:36:44,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:36:44,356 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:44,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:44,359 INFO L225 Difference]: With dead ends: 2310 [2021-04-15 02:36:44,359 INFO L226 Difference]: Without dead ends: 2296 [2021-04-15 02:36:44,359 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:36:44,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-04-15 02:36:44,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1996. [2021-04-15 02:36:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 2.93734335839599) internal successors, (5860), 1995 states have internal predecessors, (5860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:44,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 5860 transitions. [2021-04-15 02:36:44,381 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 5860 transitions. Word has length 21 [2021-04-15 02:36:44,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:44,381 INFO L480 AbstractCegarLoop]: Abstraction has 1996 states and 5860 transitions. [2021-04-15 02:36:44,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:44,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 5860 transitions. [2021-04-15 02:36:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:44,383 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:44,383 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:44,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42025 [2021-04-15 02:36:44,583 INFO L428 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:44,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:44,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1335949736, now seen corresponding path program 366 times [2021-04-15 02:36:44,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:44,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412335305] [2021-04-15 02:36:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:44,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412335305] [2021-04-15 02:36:44,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754829608] [2021-04-15 02:36:44,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:44,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:36:44,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:44,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:44,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:44,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:44,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:44,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499086599] [2021-04-15 02:36:44,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:44,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:44,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:44,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:44,825 INFO L87 Difference]: Start difference. First operand 1996 states and 5860 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:45,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:45,261 INFO L93 Difference]: Finished difference Result 2327 states and 6561 transitions. [2021-04-15 02:36:45,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:36:45,263 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:45,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:45,265 INFO L225 Difference]: With dead ends: 2327 [2021-04-15 02:36:45,265 INFO L226 Difference]: Without dead ends: 2327 [2021-04-15 02:36:45,266 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 378.8ms TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:36:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2021-04-15 02:36:45,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 2072. [2021-04-15 02:36:45,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.9391598261709317) internal successors, (6087), 2071 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 6087 transitions. [2021-04-15 02:36:45,298 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 6087 transitions. Word has length 21 [2021-04-15 02:36:45,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:45,298 INFO L480 AbstractCegarLoop]: Abstraction has 2072 states and 6087 transitions. [2021-04-15 02:36:45,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:45,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 6087 transitions. [2021-04-15 02:36:45,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:45,300 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:45,300 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:45,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42026,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:45,501 INFO L428 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:45,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:45,501 INFO L82 PathProgramCache]: Analyzing trace with hash 27654651, now seen corresponding path program 367 times [2021-04-15 02:36:45,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:45,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840401412] [2021-04-15 02:36:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:45,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840401412] [2021-04-15 02:36:45,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822271343] [2021-04-15 02:36:45,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:45,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:45,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:45,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:45,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:45,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142892044] [2021-04-15 02:36:45,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:45,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:45,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:45,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:45,743 INFO L87 Difference]: Start difference. First operand 2072 states and 6087 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:45,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:45,899 INFO L93 Difference]: Finished difference Result 2366 states and 6736 transitions. [2021-04-15 02:36:45,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:36:45,900 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:45,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:45,903 INFO L225 Difference]: With dead ends: 2366 [2021-04-15 02:36:45,903 INFO L226 Difference]: Without dead ends: 2350 [2021-04-15 02:36:45,903 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:36:45,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2021-04-15 02:36:45,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 2072. [2021-04-15 02:36:45,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.938676967648479) internal successors, (6086), 2071 states have internal predecessors, (6086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:45,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 6086 transitions. [2021-04-15 02:36:45,926 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 6086 transitions. Word has length 21 [2021-04-15 02:36:45,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:45,926 INFO L480 AbstractCegarLoop]: Abstraction has 2072 states and 6086 transitions. [2021-04-15 02:36:45,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:45,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 6086 transitions. [2021-04-15 02:36:45,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:45,928 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:45,928 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:46,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42027 [2021-04-15 02:36:46,128 INFO L428 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:46,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:46,129 INFO L82 PathProgramCache]: Analyzing trace with hash 408414270, now seen corresponding path program 368 times [2021-04-15 02:36:46,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:46,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800753624] [2021-04-15 02:36:46,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:46,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800753624] [2021-04-15 02:36:46,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504375127] [2021-04-15 02:36:46,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:46,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:36:46,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:46,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:46,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:46,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:46,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:46,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260055417] [2021-04-15 02:36:46,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:46,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:46,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:46,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:46,344 INFO L87 Difference]: Start difference. First operand 2072 states and 6086 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:46,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:46,848 INFO L93 Difference]: Finished difference Result 2511 states and 7067 transitions. [2021-04-15 02:36:46,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:36:46,849 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:46,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:46,853 INFO L225 Difference]: With dead ends: 2511 [2021-04-15 02:36:46,853 INFO L226 Difference]: Without dead ends: 2511 [2021-04-15 02:36:46,853 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 412.6ms TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:36:46,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-04-15 02:36:46,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2096. [2021-04-15 02:36:46,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.939379474940334) internal successors, (6158), 2095 states have internal predecessors, (6158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:46,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 6158 transitions. [2021-04-15 02:36:46,876 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 6158 transitions. Word has length 21 [2021-04-15 02:36:46,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:46,876 INFO L480 AbstractCegarLoop]: Abstraction has 2096 states and 6158 transitions. [2021-04-15 02:36:46,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:46,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 6158 transitions. [2021-04-15 02:36:46,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:46,878 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:46,878 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:47,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42028 [2021-04-15 02:36:47,078 INFO L428 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:47,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:47,079 INFO L82 PathProgramCache]: Analyzing trace with hash -962719899, now seen corresponding path program 369 times [2021-04-15 02:36:47,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:47,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194967806] [2021-04-15 02:36:47,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:47,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194967806] [2021-04-15 02:36:47,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372043961] [2021-04-15 02:36:47,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:47,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:36:47,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:47,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:47,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:47,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:47,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:36:47,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206249784] [2021-04-15 02:36:47,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:47,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:47,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:47,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:47,282 INFO L87 Difference]: Start difference. First operand 2096 states and 6158 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:47,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:47,492 INFO L93 Difference]: Finished difference Result 2432 states and 6850 transitions. [2021-04-15 02:36:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:36:47,493 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:47,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:47,496 INFO L225 Difference]: With dead ends: 2432 [2021-04-15 02:36:47,496 INFO L226 Difference]: Without dead ends: 2432 [2021-04-15 02:36:47,496 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:36:47,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-04-15 02:36:47,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2158. [2021-04-15 02:36:47,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 2.9531757070004634) internal successors, (6370), 2157 states have internal predecessors, (6370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 6370 transitions. [2021-04-15 02:36:47,518 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 6370 transitions. Word has length 21 [2021-04-15 02:36:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:47,518 INFO L480 AbstractCegarLoop]: Abstraction has 2158 states and 6370 transitions. [2021-04-15 02:36:47,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 6370 transitions. [2021-04-15 02:36:47,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:47,520 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:47,520 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:47,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42029,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:47,720 INFO L428 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:47,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:47,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1552318936, now seen corresponding path program 370 times [2021-04-15 02:36:47,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:47,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940083138] [2021-04-15 02:36:47,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:47,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940083138] [2021-04-15 02:36:47,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240001101] [2021-04-15 02:36:47,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:47,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:36:47,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:47,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:47,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:47,932 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:47,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:47,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:36:47,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020950402] [2021-04-15 02:36:47,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:36:47,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:47,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:36:47,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:47,933 INFO L87 Difference]: Start difference. First operand 2158 states and 6370 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:48,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:48,329 INFO L93 Difference]: Finished difference Result 2458 states and 6888 transitions. [2021-04-15 02:36:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:36:48,330 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:48,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:48,333 INFO L225 Difference]: With dead ends: 2458 [2021-04-15 02:36:48,333 INFO L226 Difference]: Without dead ends: 2454 [2021-04-15 02:36:48,333 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 280.1ms TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:36:48,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2021-04-15 02:36:48,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 2177. [2021-04-15 02:36:48,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 2.9568014705882355) internal successors, (6434), 2176 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:48,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 6434 transitions. [2021-04-15 02:36:48,356 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 6434 transitions. Word has length 21 [2021-04-15 02:36:48,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:48,356 INFO L480 AbstractCegarLoop]: Abstraction has 2177 states and 6434 transitions. [2021-04-15 02:36:48,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:48,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 6434 transitions. [2021-04-15 02:36:48,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:48,359 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:48,359 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:48,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42030,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:48,571 INFO L428 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:48,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:48,571 INFO L82 PathProgramCache]: Analyzing trace with hash -576518785, now seen corresponding path program 371 times [2021-04-15 02:36:48,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:48,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122166225] [2021-04-15 02:36:48,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:48,655 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:48,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122166225] [2021-04-15 02:36:48,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810734927] [2021-04-15 02:36:48,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:48,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:36:48,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:48,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:48,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:48,735 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:48,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:48,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:48,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748486517] [2021-04-15 02:36:48,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:48,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:48,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:48,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:48,736 INFO L87 Difference]: Start difference. First operand 2177 states and 6434 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:49,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:49,045 INFO L93 Difference]: Finished difference Result 2392 states and 6777 transitions. [2021-04-15 02:36:49,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:36:49,047 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:49,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:49,050 INFO L225 Difference]: With dead ends: 2392 [2021-04-15 02:36:49,050 INFO L226 Difference]: Without dead ends: 2386 [2021-04-15 02:36:49,050 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:36:49,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-04-15 02:36:49,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 2157. [2021-04-15 02:36:49,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 2156 states have (on average 2.950834879406308) internal successors, (6362), 2156 states have internal predecessors, (6362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:49,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 6362 transitions. [2021-04-15 02:36:49,076 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 6362 transitions. Word has length 21 [2021-04-15 02:36:49,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:49,076 INFO L480 AbstractCegarLoop]: Abstraction has 2157 states and 6362 transitions. [2021-04-15 02:36:49,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:49,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 6362 transitions. [2021-04-15 02:36:49,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:49,079 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:49,079 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:49,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42031,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:49,280 INFO L428 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:49,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:49,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1237782568, now seen corresponding path program 372 times [2021-04-15 02:36:49,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:49,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124794262] [2021-04-15 02:36:49,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:49,398 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:49,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124794262] [2021-04-15 02:36:49,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208599384] [2021-04-15 02:36:49,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:49,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:36:49,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:49,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:49,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:49,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:49,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:49,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604086849] [2021-04-15 02:36:49,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:49,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:49,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:49,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:49,509 INFO L87 Difference]: Start difference. First operand 2157 states and 6362 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:49,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:49,664 INFO L93 Difference]: Finished difference Result 2538 states and 7089 transitions. [2021-04-15 02:36:49,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:36:49,666 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:49,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:49,670 INFO L225 Difference]: With dead ends: 2538 [2021-04-15 02:36:49,670 INFO L226 Difference]: Without dead ends: 2538 [2021-04-15 02:36:49,670 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:36:49,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2021-04-15 02:36:49,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 2167. [2021-04-15 02:36:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 2.948291782086796) internal successors, (6386), 2166 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 6386 transitions. [2021-04-15 02:36:49,700 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 6386 transitions. Word has length 21 [2021-04-15 02:36:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:49,700 INFO L480 AbstractCegarLoop]: Abstraction has 2167 states and 6386 transitions. [2021-04-15 02:36:49,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:49,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 6386 transitions. [2021-04-15 02:36:49,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:49,703 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:49,703 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:49,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42032 [2021-04-15 02:36:49,903 INFO L428 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:49,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:49,904 INFO L82 PathProgramCache]: Analyzing trace with hash 577001109, now seen corresponding path program 373 times [2021-04-15 02:36:49,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:49,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758928781] [2021-04-15 02:36:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:49,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758928781] [2021-04-15 02:36:49,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134257192] [2021-04-15 02:36:49,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:49,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:49,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:50,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:50,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:50,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11718800] [2021-04-15 02:36:50,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:50,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:50,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:50,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:50,050 INFO L87 Difference]: Start difference. First operand 2167 states and 6386 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:50,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:50,319 INFO L93 Difference]: Finished difference Result 2405 states and 6848 transitions. [2021-04-15 02:36:50,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:36:50,320 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:50,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:50,323 INFO L225 Difference]: With dead ends: 2405 [2021-04-15 02:36:50,323 INFO L226 Difference]: Without dead ends: 2399 [2021-04-15 02:36:50,323 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:36:50,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2021-04-15 02:36:50,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2165. [2021-04-15 02:36:50,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2164 states have (on average 2.9482439926062844) internal successors, (6380), 2164 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:50,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 6380 transitions. [2021-04-15 02:36:50,349 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 6380 transitions. Word has length 21 [2021-04-15 02:36:50,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:50,349 INFO L480 AbstractCegarLoop]: Abstraction has 2165 states and 6380 transitions. [2021-04-15 02:36:50,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 6380 transitions. [2021-04-15 02:36:50,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:50,351 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:50,351 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:50,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42033,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:50,552 INFO L428 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:50,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:50,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1534180504, now seen corresponding path program 374 times [2021-04-15 02:36:50,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:50,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265126499] [2021-04-15 02:36:50,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:50,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265126499] [2021-04-15 02:36:50,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392456180] [2021-04-15 02:36:50,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:50,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:36:50,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:50,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:50,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:50,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:50,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:50,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855132459] [2021-04-15 02:36:50,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:50,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:50,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:50,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:50,787 INFO L87 Difference]: Start difference. First operand 2165 states and 6380 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:50,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:50,977 INFO L93 Difference]: Finished difference Result 2530 states and 7102 transitions. [2021-04-15 02:36:50,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:36:50,979 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:50,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:50,982 INFO L225 Difference]: With dead ends: 2530 [2021-04-15 02:36:50,982 INFO L226 Difference]: Without dead ends: 2530 [2021-04-15 02:36:50,982 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:36:50,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-04-15 02:36:51,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2167. [2021-04-15 02:36:51,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 2.9464450600184673) internal successors, (6382), 2166 states have internal predecessors, (6382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:51,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 6382 transitions. [2021-04-15 02:36:51,006 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 6382 transitions. Word has length 21 [2021-04-15 02:36:51,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:51,007 INFO L480 AbstractCegarLoop]: Abstraction has 2167 states and 6382 transitions. [2021-04-15 02:36:51,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:51,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 6382 transitions. [2021-04-15 02:36:51,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:51,009 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:51,009 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:51,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42034 [2021-04-15 02:36:51,209 INFO L428 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:51,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:51,209 INFO L82 PathProgramCache]: Analyzing trace with hash 148135359, now seen corresponding path program 375 times [2021-04-15 02:36:51,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:51,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491069375] [2021-04-15 02:36:51,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:51,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491069375] [2021-04-15 02:36:51,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101915239] [2021-04-15 02:36:51,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:51,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:36:51,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:51,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:51,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:51,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:51,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:51,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224812413] [2021-04-15 02:36:51,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:51,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:51,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:51,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:51,490 INFO L87 Difference]: Start difference. First operand 2167 states and 6382 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:51,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:51,819 INFO L93 Difference]: Finished difference Result 2537 states and 7205 transitions. [2021-04-15 02:36:51,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:36:51,820 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:51,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:51,824 INFO L225 Difference]: With dead ends: 2537 [2021-04-15 02:36:51,824 INFO L226 Difference]: Without dead ends: 2523 [2021-04-15 02:36:51,824 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:36:51,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2021-04-15 02:36:51,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 2167. [2021-04-15 02:36:51,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 2.945983379501385) internal successors, (6381), 2166 states have internal predecessors, (6381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:51,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 6381 transitions. [2021-04-15 02:36:51,850 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 6381 transitions. Word has length 21 [2021-04-15 02:36:51,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:51,850 INFO L480 AbstractCegarLoop]: Abstraction has 2167 states and 6381 transitions. [2021-04-15 02:36:51,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:51,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 6381 transitions. [2021-04-15 02:36:51,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:51,852 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:51,852 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:52,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42035 [2021-04-15 02:36:52,052 INFO L428 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:52,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:52,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1962129368, now seen corresponding path program 376 times [2021-04-15 02:36:52,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:52,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208812830] [2021-04-15 02:36:52,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:52,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208812830] [2021-04-15 02:36:52,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972466657] [2021-04-15 02:36:52,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:52,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:36:52,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:52,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:52,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:52,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:52,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:52,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119121425] [2021-04-15 02:36:52,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:52,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:52,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:52,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:52,276 INFO L87 Difference]: Start difference. First operand 2167 states and 6381 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:52,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:52,763 INFO L93 Difference]: Finished difference Result 2743 states and 7790 transitions. [2021-04-15 02:36:52,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:36:52,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:52,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:52,768 INFO L225 Difference]: With dead ends: 2743 [2021-04-15 02:36:52,768 INFO L226 Difference]: Without dead ends: 2743 [2021-04-15 02:36:52,768 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 384.9ms TimeCoverageRelationStatistics Valid=382, Invalid=740, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:36:52,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2021-04-15 02:36:52,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 2195. [2021-04-15 02:36:52,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 2.9512306289881494) internal successors, (6475), 2194 states have internal predecessors, (6475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:52,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 6475 transitions. [2021-04-15 02:36:52,794 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 6475 transitions. Word has length 21 [2021-04-15 02:36:52,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:52,794 INFO L480 AbstractCegarLoop]: Abstraction has 2195 states and 6475 transitions. [2021-04-15 02:36:52,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:52,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 6475 transitions. [2021-04-15 02:36:52,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:52,796 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:52,796 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:52,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42036,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:52,996 INFO L428 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:52,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:52,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1611155303, now seen corresponding path program 377 times [2021-04-15 02:36:52,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:52,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565629048] [2021-04-15 02:36:52,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:53,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565629048] [2021-04-15 02:36:53,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410847894] [2021-04-15 02:36:53,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:53,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:36:53,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:53,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:53,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:53,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:53,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:53,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364025261] [2021-04-15 02:36:53,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:53,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:53,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:53,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:53,216 INFO L87 Difference]: Start difference. First operand 2195 states and 6475 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:53,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:53,548 INFO L93 Difference]: Finished difference Result 2736 states and 7662 transitions. [2021-04-15 02:36:53,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:36:53,549 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:53,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:53,552 INFO L225 Difference]: With dead ends: 2736 [2021-04-15 02:36:53,552 INFO L226 Difference]: Without dead ends: 2722 [2021-04-15 02:36:53,552 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:36:53,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2021-04-15 02:36:53,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 2199. [2021-04-15 02:36:53,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2198 states have (on average 2.9504094631483166) internal successors, (6485), 2198 states have internal predecessors, (6485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:53,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 6485 transitions. [2021-04-15 02:36:53,579 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 6485 transitions. Word has length 21 [2021-04-15 02:36:53,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:53,579 INFO L480 AbstractCegarLoop]: Abstraction has 2199 states and 6485 transitions. [2021-04-15 02:36:53,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:53,579 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 6485 transitions. [2021-04-15 02:36:53,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:53,581 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:53,581 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:53,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42037 [2021-04-15 02:36:53,781 INFO L428 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:53,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:53,781 INFO L82 PathProgramCache]: Analyzing trace with hash 202838706, now seen corresponding path program 378 times [2021-04-15 02:36:53,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:53,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654232006] [2021-04-15 02:36:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:53,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654232006] [2021-04-15 02:36:53,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277359970] [2021-04-15 02:36:53,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:53,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:36:53,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:53,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:53,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:53,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:53,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:53,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832629486] [2021-04-15 02:36:53,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:53,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:53,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:53,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:53,972 INFO L87 Difference]: Start difference. First operand 2199 states and 6485 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:54,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:54,326 INFO L93 Difference]: Finished difference Result 2456 states and 7019 transitions. [2021-04-15 02:36:54,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:36:54,327 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:54,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:54,330 INFO L225 Difference]: With dead ends: 2456 [2021-04-15 02:36:54,330 INFO L226 Difference]: Without dead ends: 2456 [2021-04-15 02:36:54,331 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:36:54,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-04-15 02:36:54,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2205. [2021-04-15 02:36:54,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 2.9505444646098002) internal successors, (6503), 2204 states have internal predecessors, (6503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 6503 transitions. [2021-04-15 02:36:54,355 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 6503 transitions. Word has length 21 [2021-04-15 02:36:54,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:54,355 INFO L480 AbstractCegarLoop]: Abstraction has 2205 states and 6503 transitions. [2021-04-15 02:36:54,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:54,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 6503 transitions. [2021-04-15 02:36:54,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:54,357 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:54,357 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:54,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42038 [2021-04-15 02:36:54,558 INFO L428 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:54,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:54,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1566443093, now seen corresponding path program 379 times [2021-04-15 02:36:54,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:54,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374084137] [2021-04-15 02:36:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:54,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374084137] [2021-04-15 02:36:54,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309100974] [2021-04-15 02:36:54,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:54,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:54,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:54,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:54,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:54,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237324014] [2021-04-15 02:36:54,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:54,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:54,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:54,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:54,799 INFO L87 Difference]: Start difference. First operand 2205 states and 6503 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:54,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:54,947 INFO L93 Difference]: Finished difference Result 2515 states and 7190 transitions. [2021-04-15 02:36:54,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:36:54,948 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:54,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:54,951 INFO L225 Difference]: With dead ends: 2515 [2021-04-15 02:36:54,952 INFO L226 Difference]: Without dead ends: 2499 [2021-04-15 02:36:54,952 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 159.3ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:36:54,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2021-04-15 02:36:54,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 2205. [2021-04-15 02:36:54,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 2.9500907441016335) internal successors, (6502), 2204 states have internal predecessors, (6502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:54,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 6502 transitions. [2021-04-15 02:36:54,977 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 6502 transitions. Word has length 21 [2021-04-15 02:36:54,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:54,977 INFO L480 AbstractCegarLoop]: Abstraction has 2205 states and 6502 transitions. [2021-04-15 02:36:54,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:54,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 6502 transitions. [2021-04-15 02:36:54,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:54,979 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:54,979 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:55,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42039 [2021-04-15 02:36:55,180 INFO L428 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:55,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:55,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1947202712, now seen corresponding path program 380 times [2021-04-15 02:36:55,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:55,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570903558] [2021-04-15 02:36:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:55,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570903558] [2021-04-15 02:36:55,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133268723] [2021-04-15 02:36:55,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:55,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:36:55,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:55,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:55,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:55,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:55,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:36:55,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569893033] [2021-04-15 02:36:55,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:36:55,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:55,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:36:55,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:36:55,439 INFO L87 Difference]: Start difference. First operand 2205 states and 6502 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:55,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:55,916 INFO L93 Difference]: Finished difference Result 2555 states and 7288 transitions. [2021-04-15 02:36:55,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:36:55,918 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:55,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:55,921 INFO L225 Difference]: With dead ends: 2555 [2021-04-15 02:36:55,921 INFO L226 Difference]: Without dead ends: 2555 [2021-04-15 02:36:55,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 442.1ms TimeCoverageRelationStatistics Valid=384, Invalid=738, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:36:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-04-15 02:36:55,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2220. [2021-04-15 02:36:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 2219 states have (on average 2.949526813880126) internal successors, (6545), 2219 states have internal predecessors, (6545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:55,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 6545 transitions. [2021-04-15 02:36:55,950 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 6545 transitions. Word has length 21 [2021-04-15 02:36:55,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:55,950 INFO L480 AbstractCegarLoop]: Abstraction has 2220 states and 6545 transitions. [2021-04-15 02:36:55,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:55,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 6545 transitions. [2021-04-15 02:36:55,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:55,952 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:55,952 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:56,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42040,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:56,153 INFO L428 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:56,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:56,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1278888389, now seen corresponding path program 381 times [2021-04-15 02:36:56,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:56,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186918556] [2021-04-15 02:36:56,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:56,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186918556] [2021-04-15 02:36:56,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399792908] [2021-04-15 02:36:56,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:56,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:36:56,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:56,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:56,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:56,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:56,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:56,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060872053] [2021-04-15 02:36:56,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:56,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:56,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:56,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:56,356 INFO L87 Difference]: Start difference. First operand 2220 states and 6545 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:56,511 INFO L93 Difference]: Finished difference Result 2817 states and 7939 transitions. [2021-04-15 02:36:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:36:56,512 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:56,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:56,516 INFO L225 Difference]: With dead ends: 2817 [2021-04-15 02:36:56,516 INFO L226 Difference]: Without dead ends: 2817 [2021-04-15 02:36:56,516 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:36:56,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2021-04-15 02:36:56,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2469. [2021-04-15 02:36:56,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2468 states have (on average 2.98257698541329) internal successors, (7361), 2468 states have internal predecessors, (7361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:56,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 7361 transitions. [2021-04-15 02:36:56,547 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 7361 transitions. Word has length 21 [2021-04-15 02:36:56,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:56,547 INFO L480 AbstractCegarLoop]: Abstraction has 2469 states and 7361 transitions. [2021-04-15 02:36:56,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:56,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 7361 transitions. [2021-04-15 02:36:56,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:56,550 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:56,550 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:56,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42041 [2021-04-15 02:36:56,750 INFO L428 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:56,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:56,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1197758104, now seen corresponding path program 382 times [2021-04-15 02:36:56,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:56,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820413819] [2021-04-15 02:36:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:56,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820413819] [2021-04-15 02:36:56,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758120404] [2021-04-15 02:36:56,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:56,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:36:56,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:56,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:56,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:56,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:56,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:56,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239863601] [2021-04-15 02:36:56,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:56,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:56,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:56,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:56,895 INFO L87 Difference]: Start difference. First operand 2469 states and 7361 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:57,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:57,131 INFO L93 Difference]: Finished difference Result 2731 states and 7803 transitions. [2021-04-15 02:36:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:36:57,132 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:57,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:57,135 INFO L225 Difference]: With dead ends: 2731 [2021-04-15 02:36:57,135 INFO L226 Difference]: Without dead ends: 2729 [2021-04-15 02:36:57,135 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:36:57,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-04-15 02:36:57,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2491. [2021-04-15 02:36:57,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 2490 states have (on average 2.9887550200803212) internal successors, (7442), 2490 states have internal predecessors, (7442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:57,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 7442 transitions. [2021-04-15 02:36:57,159 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 7442 transitions. Word has length 21 [2021-04-15 02:36:57,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:57,159 INFO L480 AbstractCegarLoop]: Abstraction has 2491 states and 7442 transitions. [2021-04-15 02:36:57,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:57,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 7442 transitions. [2021-04-15 02:36:57,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:57,161 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:57,161 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:57,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42042,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:57,362 INFO L428 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:57,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:57,362 INFO L82 PathProgramCache]: Analyzing trace with hash 315839103, now seen corresponding path program 383 times [2021-04-15 02:36:57,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:57,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610205497] [2021-04-15 02:36:57,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:57,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610205497] [2021-04-15 02:36:57,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184202815] [2021-04-15 02:36:57,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:57,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:36:57,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:57,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:57,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:57,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:57,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:57,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131757715] [2021-04-15 02:36:57,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:57,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:57,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:57,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:57,533 INFO L87 Difference]: Start difference. First operand 2491 states and 7442 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:57,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:57,761 INFO L93 Difference]: Finished difference Result 2816 states and 7978 transitions. [2021-04-15 02:36:57,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:36:57,762 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:57,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:57,765 INFO L225 Difference]: With dead ends: 2816 [2021-04-15 02:36:57,765 INFO L226 Difference]: Without dead ends: 2814 [2021-04-15 02:36:57,765 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:36:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2021-04-15 02:36:57,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2473. [2021-04-15 02:36:57,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2472 states have (on average 2.982200647249191) internal successors, (7372), 2472 states have internal predecessors, (7372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:57,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 7372 transitions. [2021-04-15 02:36:57,793 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 7372 transitions. Word has length 21 [2021-04-15 02:36:57,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:57,793 INFO L480 AbstractCegarLoop]: Abstraction has 2473 states and 7372 transitions. [2021-04-15 02:36:57,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:57,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 7372 transitions. [2021-04-15 02:36:57,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:57,796 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:57,796 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:57,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42043 [2021-04-15 02:36:57,996 INFO L428 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:57,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:57,996 INFO L82 PathProgramCache]: Analyzing trace with hash -345424680, now seen corresponding path program 384 times [2021-04-15 02:36:57,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:57,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157325493] [2021-04-15 02:36:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:58,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157325493] [2021-04-15 02:36:58,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877400892] [2021-04-15 02:36:58,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:58,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:36:58,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:58,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:58,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:58,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:58,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:58,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113928482] [2021-04-15 02:36:58,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:58,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:58,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:58,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:58,208 INFO L87 Difference]: Start difference. First operand 2473 states and 7372 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:58,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:58,436 INFO L93 Difference]: Finished difference Result 2803 states and 7966 transitions. [2021-04-15 02:36:58,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:36:58,437 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:58,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:58,441 INFO L225 Difference]: With dead ends: 2803 [2021-04-15 02:36:58,441 INFO L226 Difference]: Without dead ends: 2803 [2021-04-15 02:36:58,441 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:36:58,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2021-04-15 02:36:58,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 2479. [2021-04-15 02:36:58,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2479 states, 2478 states have (on average 2.982243744955609) internal successors, (7390), 2478 states have internal predecessors, (7390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:58,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 7390 transitions. [2021-04-15 02:36:58,469 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 7390 transitions. Word has length 21 [2021-04-15 02:36:58,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:58,469 INFO L480 AbstractCegarLoop]: Abstraction has 2479 states and 7390 transitions. [2021-04-15 02:36:58,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:58,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 7390 transitions. [2021-04-15 02:36:58,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:58,472 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:58,472 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:58,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42044,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:58,672 INFO L428 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:58,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:58,672 INFO L82 PathProgramCache]: Analyzing trace with hash 931503419, now seen corresponding path program 385 times [2021-04-15 02:36:58,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:58,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467993668] [2021-04-15 02:36:58,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:58,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467993668] [2021-04-15 02:36:58,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120189952] [2021-04-15 02:36:58,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:58,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:58,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:58,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:58,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:58,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134463722] [2021-04-15 02:36:58,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:58,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:58,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:58,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:58,889 INFO L87 Difference]: Start difference. First operand 2479 states and 7390 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:59,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:59,179 INFO L93 Difference]: Finished difference Result 2905 states and 8239 transitions. [2021-04-15 02:36:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:36:59,181 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:59,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:59,184 INFO L225 Difference]: With dead ends: 2905 [2021-04-15 02:36:59,185 INFO L226 Difference]: Without dead ends: 2901 [2021-04-15 02:36:59,185 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:36:59,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2021-04-15 02:36:59,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 2479. [2021-04-15 02:36:59,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2479 states, 2478 states have (on average 2.9818401937046004) internal successors, (7389), 2478 states have internal predecessors, (7389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:59,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 7389 transitions. [2021-04-15 02:36:59,213 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 7389 transitions. Word has length 21 [2021-04-15 02:36:59,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:59,214 INFO L480 AbstractCegarLoop]: Abstraction has 2479 states and 7389 transitions. [2021-04-15 02:36:59,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:59,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 7389 transitions. [2021-04-15 02:36:59,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:59,216 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:59,216 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:36:59,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42045 [2021-04-15 02:36:59,416 INFO L428 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:36:59,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:36:59,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1888682814, now seen corresponding path program 386 times [2021-04-15 02:36:59,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:36:59,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431409008] [2021-04-15 02:36:59,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:36:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:36:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:59,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431409008] [2021-04-15 02:36:59,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915861239] [2021-04-15 02:36:59,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:36:59,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:36:59,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:36:59,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:36:59,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:36:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:36:59,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:36:59,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:36:59,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45465886] [2021-04-15 02:36:59,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:36:59,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:36:59,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:36:59,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:36:59,589 INFO L87 Difference]: Start difference. First operand 2479 states and 7389 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:59,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:36:59,771 INFO L93 Difference]: Finished difference Result 2825 states and 8053 transitions. [2021-04-15 02:36:59,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:36:59,772 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:36:59,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:36:59,775 INFO L225 Difference]: With dead ends: 2825 [2021-04-15 02:36:59,775 INFO L226 Difference]: Without dead ends: 2825 [2021-04-15 02:36:59,776 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:36:59,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2825 states. [2021-04-15 02:36:59,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2825 to 2499. [2021-04-15 02:36:59,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 2.9843875100080064) internal successors, (7455), 2498 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:59,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 7455 transitions. [2021-04-15 02:36:59,804 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 7455 transitions. Word has length 21 [2021-04-15 02:36:59,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:36:59,805 INFO L480 AbstractCegarLoop]: Abstraction has 2499 states and 7455 transitions. [2021-04-15 02:36:59,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:36:59,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 7455 transitions. [2021-04-15 02:36:59,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:36:59,807 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:36:59,807 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:00,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42046,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:00,007 INFO L428 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:00,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:00,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1457739265, now seen corresponding path program 387 times [2021-04-15 02:37:00,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:00,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651962529] [2021-04-15 02:37:00,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:00,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651962529] [2021-04-15 02:37:00,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385060492] [2021-04-15 02:37:00,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:00,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:37:00,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:00,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:37:00,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:37:00,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:00,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:37:00,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374048583] [2021-04-15 02:37:00,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:37:00,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:00,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:37:00,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:37:00,206 INFO L87 Difference]: Start difference. First operand 2499 states and 7455 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:00,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:00,498 INFO L93 Difference]: Finished difference Result 2886 states and 8196 transitions. [2021-04-15 02:37:00,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:37:00,499 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:37:00,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:00,503 INFO L225 Difference]: With dead ends: 2886 [2021-04-15 02:37:00,503 INFO L226 Difference]: Without dead ends: 2880 [2021-04-15 02:37:00,503 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:37:00,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-04-15 02:37:00,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2499. [2021-04-15 02:37:00,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 2.9839871897518013) internal successors, (7454), 2498 states have internal predecessors, (7454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 7454 transitions. [2021-04-15 02:37:00,534 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 7454 transitions. Word has length 21 [2021-04-15 02:37:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:00,534 INFO L480 AbstractCegarLoop]: Abstraction has 2499 states and 7454 transitions. [2021-04-15 02:37:00,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 7454 transitions. [2021-04-15 02:37:00,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:37:00,536 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:00,536 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:00,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42047 [2021-04-15 02:37:00,737 INFO L428 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:00,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:00,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1785148859, now seen corresponding path program 388 times [2021-04-15 02:37:00,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:00,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718423833] [2021-04-15 02:37:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:00,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718423833] [2021-04-15 02:37:00,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129023288] [2021-04-15 02:37:00,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:00,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:37:00,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:00,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:37:00,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:00,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:00,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:37:00,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679966096] [2021-04-15 02:37:00,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:37:00,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:00,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:37:00,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:37:00,931 INFO L87 Difference]: Start difference. First operand 2499 states and 7454 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:01,176 INFO L93 Difference]: Finished difference Result 2922 states and 8263 transitions. [2021-04-15 02:37:01,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:37:01,177 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:37:01,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:01,180 INFO L225 Difference]: With dead ends: 2922 [2021-04-15 02:37:01,181 INFO L226 Difference]: Without dead ends: 2914 [2021-04-15 02:37:01,181 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:37:01,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2021-04-15 02:37:01,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 2531. [2021-04-15 02:37:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 2.990513833992095) internal successors, (7566), 2530 states have internal predecessors, (7566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:01,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 7566 transitions. [2021-04-15 02:37:01,207 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 7566 transitions. Word has length 21 [2021-04-15 02:37:01,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:01,207 INFO L480 AbstractCegarLoop]: Abstraction has 2531 states and 7566 transitions. [2021-04-15 02:37:01,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:01,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 7566 transitions. [2021-04-15 02:37:01,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:37:01,209 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:01,209 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:01,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42048 [2021-04-15 02:37:01,410 INFO L428 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:01,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:01,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1920192126, now seen corresponding path program 389 times [2021-04-15 02:37:01,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:01,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967593211] [2021-04-15 02:37:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:01,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967593211] [2021-04-15 02:37:01,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803473843] [2021-04-15 02:37:01,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:01,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:37:01,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:01,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:37:01,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:01,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:01,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:37:01,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173329382] [2021-04-15 02:37:01,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:37:01,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:01,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:37:01,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:37:01,592 INFO L87 Difference]: Start difference. First operand 2531 states and 7566 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:01,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:01,854 INFO L93 Difference]: Finished difference Result 2866 states and 8270 transitions. [2021-04-15 02:37:01,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:37:01,855 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:37:01,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:01,859 INFO L225 Difference]: With dead ends: 2866 [2021-04-15 02:37:01,859 INFO L226 Difference]: Without dead ends: 2866 [2021-04-15 02:37:01,859 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:37:01,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2021-04-15 02:37:01,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2613. [2021-04-15 02:37:01,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2613 states, 2612 states have (on average 2.9931087289433385) internal successors, (7818), 2612 states have internal predecessors, (7818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 7818 transitions. [2021-04-15 02:37:01,889 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 7818 transitions. Word has length 21 [2021-04-15 02:37:01,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:01,889 INFO L480 AbstractCegarLoop]: Abstraction has 2613 states and 7818 transitions. [2021-04-15 02:37:01,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:01,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 7818 transitions. [2021-04-15 02:37:01,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:37:01,892 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:01,892 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:02,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42049 [2021-04-15 02:37:02,092 INFO L428 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:02,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:02,092 INFO L82 PathProgramCache]: Analyzing trace with hash -764534401, now seen corresponding path program 390 times [2021-04-15 02:37:02,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:02,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924005387] [2021-04-15 02:37:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:02,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:02,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924005387] [2021-04-15 02:37:02,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211284958] [2021-04-15 02:37:02,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:02,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:37:02,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:02,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:37:02,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:02,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:02,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:37:02,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813149674] [2021-04-15 02:37:02,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:37:02,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:02,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:37:02,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:37:02,243 INFO L87 Difference]: Start difference. First operand 2613 states and 7818 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:02,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:02,503 INFO L93 Difference]: Finished difference Result 3493 states and 9885 transitions. [2021-04-15 02:37:02,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:37:02,504 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:37:02,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:02,509 INFO L225 Difference]: With dead ends: 3493 [2021-04-15 02:37:02,509 INFO L226 Difference]: Without dead ends: 3483 [2021-04-15 02:37:02,509 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:37:02,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3483 states. [2021-04-15 02:37:02,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3483 to 2611. [2021-04-15 02:37:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2610 states have (on average 2.9931034482758623) internal successors, (7812), 2610 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:02,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 7812 transitions. [2021-04-15 02:37:02,545 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 7812 transitions. Word has length 21 [2021-04-15 02:37:02,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:02,545 INFO L480 AbstractCegarLoop]: Abstraction has 2611 states and 7812 transitions. [2021-04-15 02:37:02,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:02,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 7812 transitions. [2021-04-15 02:37:02,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:37:02,548 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:02,548 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:02,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42050 [2021-04-15 02:37:02,749 INFO L428 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:02,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:02,749 INFO L82 PathProgramCache]: Analyzing trace with hash -891640232, now seen corresponding path program 391 times [2021-04-15 02:37:02,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:02,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513442971] [2021-04-15 02:37:02,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:02,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513442971] [2021-04-15 02:37:02,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28381660] [2021-04-15 02:37:02,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:02,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:37:02,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:02,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:02,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:37:02,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718335355] [2021-04-15 02:37:02,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:37:02,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:02,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:37:02,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:37:02,952 INFO L87 Difference]: Start difference. First operand 2611 states and 7812 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:03,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:03,331 INFO L93 Difference]: Finished difference Result 3000 states and 8753 transitions. [2021-04-15 02:37:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:37:03,333 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:37:03,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:03,338 INFO L225 Difference]: With dead ends: 3000 [2021-04-15 02:37:03,338 INFO L226 Difference]: Without dead ends: 3000 [2021-04-15 02:37:03,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 278.5ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:37:03,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-04-15 02:37:03,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2792. [2021-04-15 02:37:03,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2791 states have (on average 2.996058760300967) internal successors, (8362), 2791 states have internal predecessors, (8362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:03,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 8362 transitions. [2021-04-15 02:37:03,384 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 8362 transitions. Word has length 21 [2021-04-15 02:37:03,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:03,384 INFO L480 AbstractCegarLoop]: Abstraction has 2792 states and 8362 transitions. [2021-04-15 02:37:03,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:03,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 8362 transitions. [2021-04-15 02:37:03,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:37:03,387 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:03,387 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:03,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42051,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:03,610 INFO L428 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:03,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:03,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1799663163, now seen corresponding path program 392 times [2021-04-15 02:37:03,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:03,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712202387] [2021-04-15 02:37:03,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:37:03,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712202387] [2021-04-15 02:37:03,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391588694] [2021-04-15 02:37:03,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:03,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:37:03,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:03,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:37:03,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:37:03,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:03,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:37:03,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136415901] [2021-04-15 02:37:03,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:37:03,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:03,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:37:03,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:37:03,833 INFO L87 Difference]: Start difference. First operand 2792 states and 8362 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:04,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:04,102 INFO L93 Difference]: Finished difference Result 3511 states and 10009 transitions. [2021-04-15 02:37:04,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:37:04,104 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:37:04,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:04,108 INFO L225 Difference]: With dead ends: 3511 [2021-04-15 02:37:04,108 INFO L226 Difference]: Without dead ends: 3499 [2021-04-15 02:37:04,109 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 240.7ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:37:04,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3499 states. [2021-04-15 02:37:04,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3499 to 2792. [2021-04-15 02:37:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2791 states have (on average 2.9953421712647796) internal successors, (8360), 2791 states have internal predecessors, (8360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:04,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 8360 transitions. [2021-04-15 02:37:04,143 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 8360 transitions. Word has length 21 [2021-04-15 02:37:04,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:04,143 INFO L480 AbstractCegarLoop]: Abstraction has 2792 states and 8360 transitions. [2021-04-15 02:37:04,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:04,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 8360 transitions. [2021-04-15 02:37:04,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:37:04,146 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:04,146 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:04,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42052,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:04,346 INFO L428 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:04,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:04,347 INFO L82 PathProgramCache]: Analyzing trace with hash 2135869886, now seen corresponding path program 393 times [2021-04-15 02:37:04,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:04,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994002378] [2021-04-15 02:37:04,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:37:04,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994002378] [2021-04-15 02:37:04,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634067650] [2021-04-15 02:37:04,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:04,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:37:04,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:04,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:37:04,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:04,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:37:04,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:04,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:37:04,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755927286] [2021-04-15 02:37:04,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:37:04,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:04,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:37:04,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:37:04,544 INFO L87 Difference]: Start difference. First operand 2792 states and 8360 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:04,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:04,704 INFO L93 Difference]: Finished difference Result 2946 states and 8690 transitions. [2021-04-15 02:37:04,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:37:04,705 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:37:04,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:04,709 INFO L225 Difference]: With dead ends: 2946 [2021-04-15 02:37:04,709 INFO L226 Difference]: Without dead ends: 2946 [2021-04-15 02:37:04,709 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:37:04,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2021-04-15 02:37:04,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 2829. [2021-04-15 02:37:04,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2829 states, 2828 states have (on average 2.9954031117397455) internal successors, (8471), 2828 states have internal predecessors, (8471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:04,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 8471 transitions. [2021-04-15 02:37:04,739 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 8471 transitions. Word has length 21 [2021-04-15 02:37:04,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:04,739 INFO L480 AbstractCegarLoop]: Abstraction has 2829 states and 8471 transitions. [2021-04-15 02:37:04,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:04,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 8471 transitions. [2021-04-15 02:37:04,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:37:04,742 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:04,742 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:04,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42053 [2021-04-15 02:37:04,943 INFO L428 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:04,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:04,943 INFO L82 PathProgramCache]: Analyzing trace with hash -314590977, now seen corresponding path program 394 times [2021-04-15 02:37:04,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:04,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329318354] [2021-04-15 02:37:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:05,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329318354] [2021-04-15 02:37:05,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913146215] [2021-04-15 02:37:05,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:05,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:37:05,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:05,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:37:05,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:05,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:05,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:37:05,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684783550] [2021-04-15 02:37:05,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:37:05,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:05,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:37:05,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:37:05,191 INFO L87 Difference]: Start difference. First operand 2829 states and 8471 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:05,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:05,552 INFO L93 Difference]: Finished difference Result 3527 states and 10081 transitions. [2021-04-15 02:37:05,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:37:05,554 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:37:05,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:05,559 INFO L225 Difference]: With dead ends: 3527 [2021-04-15 02:37:05,559 INFO L226 Difference]: Without dead ends: 3513 [2021-04-15 02:37:05,559 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 298.9ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:37:05,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2021-04-15 02:37:05,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 2850. [2021-04-15 02:37:05,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 2849 states have (on average 2.995085995085995) internal successors, (8533), 2849 states have internal predecessors, (8533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 8533 transitions. [2021-04-15 02:37:05,595 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 8533 transitions. Word has length 21 [2021-04-15 02:37:05,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:05,595 INFO L480 AbstractCegarLoop]: Abstraction has 2850 states and 8533 transitions. [2021-04-15 02:37:05,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:05,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 8533 transitions. [2021-04-15 02:37:05,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:37:05,597 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:05,597 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:05,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42054,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:05,798 INFO L428 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:05,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:05,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1499403032, now seen corresponding path program 395 times [2021-04-15 02:37:05,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:05,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510972695] [2021-04-15 02:37:05,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:05,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510972695] [2021-04-15 02:37:05,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525222236] [2021-04-15 02:37:05,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:05,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:37:05,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:05,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:37:05,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:06,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:06,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:37:06,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687739734] [2021-04-15 02:37:06,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:37:06,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:06,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:37:06,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:37:06,044 INFO L87 Difference]: Start difference. First operand 2850 states and 8533 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:06,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:06,354 INFO L93 Difference]: Finished difference Result 3031 states and 8881 transitions. [2021-04-15 02:37:06,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:37:06,355 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:37:06,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:06,359 INFO L225 Difference]: With dead ends: 3031 [2021-04-15 02:37:06,359 INFO L226 Difference]: Without dead ends: 3031 [2021-04-15 02:37:06,359 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 286.5ms TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:37:06,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2021-04-15 02:37:06,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 2849. [2021-04-15 02:37:06,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 2.995084269662921) internal successors, (8530), 2848 states have internal predecessors, (8530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:06,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 8530 transitions. [2021-04-15 02:37:06,391 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 8530 transitions. Word has length 21 [2021-04-15 02:37:06,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:06,391 INFO L480 AbstractCegarLoop]: Abstraction has 2849 states and 8530 transitions. [2021-04-15 02:37:06,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:06,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 8530 transitions. [2021-04-15 02:37:06,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:37:06,394 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:06,394 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:06,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42055,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:06,595 INFO L428 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:06,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:06,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1431959877, now seen corresponding path program 396 times [2021-04-15 02:37:06,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:06,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771274092] [2021-04-15 02:37:06,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:06,678 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:06,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771274092] [2021-04-15 02:37:06,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830541826] [2021-04-15 02:37:06,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:06,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:37:06,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:06,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:37:06,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:06,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:06,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:37:06,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345752300] [2021-04-15 02:37:06,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:37:06,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:06,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:37:06,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:37:06,791 INFO L87 Difference]: Start difference. First operand 2849 states and 8530 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:06,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:06,959 INFO L93 Difference]: Finished difference Result 3200 states and 9309 transitions. [2021-04-15 02:37:06,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:37:06,960 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:37:06,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:06,964 INFO L225 Difference]: With dead ends: 3200 [2021-04-15 02:37:06,964 INFO L226 Difference]: Without dead ends: 3184 [2021-04-15 02:37:06,964 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:37:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-04-15 02:37:06,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2849. [2021-04-15 02:37:06,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 2.9947331460674156) internal successors, (8529), 2848 states have internal predecessors, (8529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:06,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 8529 transitions. [2021-04-15 02:37:06,997 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 8529 transitions. Word has length 21 [2021-04-15 02:37:06,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:06,997 INFO L480 AbstractCegarLoop]: Abstraction has 2849 states and 8529 transitions. [2021-04-15 02:37:06,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:06,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 8529 transitions. [2021-04-15 02:37:07,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:37:07,000 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:07,000 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:07,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42056 [2021-04-15 02:37:07,201 INFO L428 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:07,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:07,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1051200258, now seen corresponding path program 397 times [2021-04-15 02:37:07,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:07,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744171144] [2021-04-15 02:37:07,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:07,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744171144] [2021-04-15 02:37:07,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393515369] [2021-04-15 02:37:07,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:07,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:37:07,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:07,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:07,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:37:07,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987843504] [2021-04-15 02:37:07,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:37:07,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:07,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:37:07,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:37:07,452 INFO L87 Difference]: Start difference. First operand 2849 states and 8529 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:07,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:07,845 INFO L93 Difference]: Finished difference Result 3136 states and 9159 transitions. [2021-04-15 02:37:07,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:37:07,846 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:37:07,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:07,850 INFO L225 Difference]: With dead ends: 3136 [2021-04-15 02:37:07,850 INFO L226 Difference]: Without dead ends: 3136 [2021-04-15 02:37:07,850 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 360.0ms TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:37:07,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-04-15 02:37:07,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2861. [2021-04-15 02:37:07,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2861 states, 2860 states have (on average 2.9947552447552446) internal successors, (8565), 2860 states have internal predecessors, (8565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:07,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 8565 transitions. [2021-04-15 02:37:07,883 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 8565 transitions. Word has length 21 [2021-04-15 02:37:07,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:07,883 INFO L480 AbstractCegarLoop]: Abstraction has 2861 states and 8565 transitions. [2021-04-15 02:37:07,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:07,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 8565 transitions. [2021-04-15 02:37:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:37:07,885 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:07,885 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:08,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42057 [2021-04-15 02:37:08,085 INFO L428 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:08,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:08,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1710657409, now seen corresponding path program 398 times [2021-04-15 02:37:08,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:08,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092553944] [2021-04-15 02:37:08,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:08,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092553944] [2021-04-15 02:37:08,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622714543] [2021-04-15 02:37:08,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:08,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:37:08,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:08,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:37:08,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:08,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:08,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:37:08,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226552554] [2021-04-15 02:37:08,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:37:08,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:08,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:37:08,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:37:08,288 INFO L87 Difference]: Start difference. First operand 2861 states and 8565 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:08,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:08,420 INFO L93 Difference]: Finished difference Result 3190 states and 9294 transitions. [2021-04-15 02:37:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:37:08,422 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:37:08,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:08,426 INFO L225 Difference]: With dead ends: 3190 [2021-04-15 02:37:08,426 INFO L226 Difference]: Without dead ends: 3172 [2021-04-15 02:37:08,426 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:37:08,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3172 states. [2021-04-15 02:37:08,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3172 to 2859. [2021-04-15 02:37:08,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2858 states have (on average 2.9954513645906227) internal successors, (8561), 2858 states have internal predecessors, (8561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:08,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 8561 transitions. [2021-04-15 02:37:08,458 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 8561 transitions. Word has length 21 [2021-04-15 02:37:08,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:08,458 INFO L480 AbstractCegarLoop]: Abstraction has 2859 states and 8561 transitions. [2021-04-15 02:37:08,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:08,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 8561 transitions. [2021-04-15 02:37:08,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:37:08,461 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:08,461 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:08,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42058 [2021-04-15 02:37:08,661 INFO L428 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:08,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:08,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1484476376, now seen corresponding path program 399 times [2021-04-15 02:37:08,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:08,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938335795] [2021-04-15 02:37:08,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:08,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938335795] [2021-04-15 02:37:08,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511995491] [2021-04-15 02:37:08,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:08,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:37:08,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:08,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:37:08,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:08,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:08,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:37:08,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732614124] [2021-04-15 02:37:08,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:37:08,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:08,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:37:08,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:37:08,970 INFO L87 Difference]: Start difference. First operand 2859 states and 8561 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:09,399 INFO L93 Difference]: Finished difference Result 3368 states and 9806 transitions. [2021-04-15 02:37:09,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:37:09,400 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:37:09,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:09,405 INFO L225 Difference]: With dead ends: 3368 [2021-04-15 02:37:09,405 INFO L226 Difference]: Without dead ends: 3368 [2021-04-15 02:37:09,405 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:37:09,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-04-15 02:37:09,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 2877. [2021-04-15 02:37:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2877 states, 2876 states have (on average 2.9944367176634215) internal successors, (8612), 2876 states have internal predecessors, (8612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 8612 transitions. [2021-04-15 02:37:09,439 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 8612 transitions. Word has length 21 [2021-04-15 02:37:09,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:09,440 INFO L480 AbstractCegarLoop]: Abstraction has 2877 states and 8612 transitions. [2021-04-15 02:37:09,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:09,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 8612 transitions. [2021-04-15 02:37:09,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:37:09,442 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:09,442 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:09,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42059,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:09,643 INFO L428 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:09,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:09,643 INFO L82 PathProgramCache]: Analyzing trace with hash -857679500, now seen corresponding path program 400 times [2021-04-15 02:37:09,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:09,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223405269] [2021-04-15 02:37:09,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:09,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223405269] [2021-04-15 02:37:09,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310767767] [2021-04-15 02:37:09,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:09,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:37:09,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:09,956 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:37:09,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:10,946 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:37:10,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:37:10,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:37:14,783 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1187 DAG size of output: 904 [2021-04-15 02:37:15,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:37:15,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:37:15,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:37:15,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-04-15 02:37:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:15,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:15,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 02:37:15,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749087883] [2021-04-15 02:37:15,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:37:15,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:15,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:37:15,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:37:15,750 INFO L87 Difference]: Start difference. First operand 2877 states and 8612 transitions. Second operand has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:16,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:16,640 INFO L93 Difference]: Finished difference Result 2974 states and 8809 transitions. [2021-04-15 02:37:16,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:37:16,641 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:37:16,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:16,644 INFO L225 Difference]: With dead ends: 2974 [2021-04-15 02:37:16,644 INFO L226 Difference]: Without dead ends: 2941 [2021-04-15 02:37:16,644 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1096.3ms TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:37:16,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2021-04-15 02:37:16,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 2898. [2021-04-15 02:37:16,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2898 states, 2897 states have (on average 2.9934414911977907) internal successors, (8672), 2897 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2898 states to 2898 states and 8672 transitions. [2021-04-15 02:37:16,669 INFO L78 Accepts]: Start accepts. Automaton has 2898 states and 8672 transitions. Word has length 22 [2021-04-15 02:37:16,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:16,669 INFO L480 AbstractCegarLoop]: Abstraction has 2898 states and 8672 transitions. [2021-04-15 02:37:16,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:16,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2898 states and 8672 transitions. [2021-04-15 02:37:16,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:37:16,672 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:16,672 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:16,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42060,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:16,894 INFO L428 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:16,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:16,894 INFO L82 PathProgramCache]: Analyzing trace with hash -599146780, now seen corresponding path program 401 times [2021-04-15 02:37:16,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:16,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367587649] [2021-04-15 02:37:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:17,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367587649] [2021-04-15 02:37:17,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159604209] [2021-04-15 02:37:17,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:17,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:37:17,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:17,178 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:37:17,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:18,093 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:37:18,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:37:18,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:37:21,900 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 1419 DAG size of output: 950 [2021-04-15 02:37:22,777 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 1685 DAG size of output: 1077 [2021-04-15 02:37:22,937 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1685 DAG size of output: 1077 [2021-04-15 02:37:23,082 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1694 DAG size of output: 1086 [2021-04-15 02:37:23,204 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1088 DAG size of output: 1055 [2021-04-15 02:37:24,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:37:24,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:37:24,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:37:24,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-04-15 02:37:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:24,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:24,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:37:24,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622444904] [2021-04-15 02:37:24,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:37:24,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:24,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:37:24,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:37:24,892 INFO L87 Difference]: Start difference. First operand 2898 states and 8672 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:25,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:25,781 INFO L93 Difference]: Finished difference Result 3004 states and 8897 transitions. [2021-04-15 02:37:25,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:37:25,782 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:37:25,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:25,786 INFO L225 Difference]: With dead ends: 3004 [2021-04-15 02:37:25,786 INFO L226 Difference]: Without dead ends: 2988 [2021-04-15 02:37:25,786 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 886.9ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:37:25,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2021-04-15 02:37:25,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 2920. [2021-04-15 02:37:25,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2920 states, 2919 states have (on average 2.9969167523124356) internal successors, (8748), 2919 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 8748 transitions. [2021-04-15 02:37:25,819 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 8748 transitions. Word has length 22 [2021-04-15 02:37:25,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:25,819 INFO L480 AbstractCegarLoop]: Abstraction has 2920 states and 8748 transitions. [2021-04-15 02:37:25,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:25,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 8748 transitions. [2021-04-15 02:37:25,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:37:25,822 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:25,822 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:26,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43234 [2021-04-15 02:37:26,023 INFO L428 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:26,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:26,023 INFO L82 PathProgramCache]: Analyzing trace with hash 144436580, now seen corresponding path program 402 times [2021-04-15 02:37:26,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:26,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326783653] [2021-04-15 02:37:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:26,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326783653] [2021-04-15 02:37:26,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406714604] [2021-04-15 02:37:26,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:26,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:37:26,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:26,267 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:37:26,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:27,163 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:37:27,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:37:27,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:37:31,115 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 716 [2021-04-15 02:37:31,230 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 941 DAG size of output: 745 [2021-04-15 02:37:31,360 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1057 DAG size of output: 829 [2021-04-15 02:37:31,524 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 1078 DAG size of output: 843 [2021-04-15 02:37:31,660 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1078 DAG size of output: 843 [2021-04-15 02:37:31,799 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 1084 DAG size of output: 849 [2021-04-15 02:37:31,919 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 851 DAG size of output: 791 [2021-04-15 02:37:33,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:37:34,757 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-04-15 02:37:34,758 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-04-15 02:37:34,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-04-15 02:37:38,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:37:38,689 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:37:38,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:37:38,712 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:37:38,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:37:38,713 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-04-15 02:37:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:38,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:38,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:37:38,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208227853] [2021-04-15 02:37:38,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:37:38,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:38,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:37:38,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:37:38,759 INFO L87 Difference]: Start difference. First operand 2920 states and 8748 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:39,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:39,718 INFO L93 Difference]: Finished difference Result 3029 states and 8956 transitions. [2021-04-15 02:37:39,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:37:39,719 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:37:39,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:39,722 INFO L225 Difference]: With dead ends: 3029 [2021-04-15 02:37:39,722 INFO L226 Difference]: Without dead ends: 3019 [2021-04-15 02:37:39,723 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 770.5ms TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:37:39,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-04-15 02:37:39,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 2920. [2021-04-15 02:37:39,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2920 states, 2919 states have (on average 2.9969167523124356) internal successors, (8748), 2919 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:39,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 8748 transitions. [2021-04-15 02:37:39,773 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 8748 transitions. Word has length 22 [2021-04-15 02:37:39,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:39,774 INFO L480 AbstractCegarLoop]: Abstraction has 2920 states and 8748 transitions. [2021-04-15 02:37:39,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:39,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 8748 transitions. [2021-04-15 02:37:39,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:37:39,776 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:39,776 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:39,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44752 [2021-04-15 02:37:39,977 INFO L428 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:39,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:39,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1666470026, now seen corresponding path program 403 times [2021-04-15 02:37:39,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:39,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075454349] [2021-04-15 02:37:39,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:40,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075454349] [2021-04-15 02:37:40,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688061410] [2021-04-15 02:37:40,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:40,207 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:37:40,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:41,056 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:37:41,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:37:41,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:37:45,472 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1431 DAG size of output: 748 [2021-04-15 02:37:46,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:37:46,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:37:46,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:37:46,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-04-15 02:37:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:46,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:37:46,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:37:46,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669349592] [2021-04-15 02:37:46,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:37:46,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:37:46,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:37:46,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:37:46,739 INFO L87 Difference]: Start difference. First operand 2920 states and 8748 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:47,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:37:47,818 INFO L93 Difference]: Finished difference Result 3070 states and 9137 transitions. [2021-04-15 02:37:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:37:47,819 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:37:47,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:37:47,823 INFO L225 Difference]: With dead ends: 3070 [2021-04-15 02:37:47,823 INFO L226 Difference]: Without dead ends: 3054 [2021-04-15 02:37:47,823 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 734.4ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:37:47,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3054 states. [2021-04-15 02:37:47,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3054 to 2980. [2021-04-15 02:37:47,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2979 states have (on average 3.008056394763343) internal successors, (8961), 2979 states have internal predecessors, (8961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 8961 transitions. [2021-04-15 02:37:47,856 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 8961 transitions. Word has length 22 [2021-04-15 02:37:47,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:37:47,856 INFO L480 AbstractCegarLoop]: Abstraction has 2980 states and 8961 transitions. [2021-04-15 02:37:47,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:37:47,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 8961 transitions. [2021-04-15 02:37:47,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:37:47,859 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:37:47,859 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:37:48,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47091 [2021-04-15 02:37:48,060 INFO L428 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:37:48,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:37:48,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1884913910, now seen corresponding path program 404 times [2021-04-15 02:37:48,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:37:48,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101528181] [2021-04-15 02:37:48,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:37:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:37:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:37:48,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101528181] [2021-04-15 02:37:48,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048977044] [2021-04-15 02:37:48,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:37:48,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:37:48,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:37:48,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:37:48,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:37:49,146 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:37:49,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:37:49,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:37:52,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:37:53,221 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-04-15 02:37:53,222 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-04-15 02:37:53,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-04-15 02:37:56,288 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 1160 DAG size of output: 961 [2021-04-15 02:37:58,510 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 2104 DAG size of output: 1537 [2021-04-15 02:38:02,680 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1675 DAG size of output: 1281 [2021-04-15 02:38:03,058 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 3333 DAG size of output: 2442 [2021-04-15 02:38:03,409 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 3333 DAG size of output: 2442 [2021-04-15 02:38:03,821 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 3341 DAG size of output: 2369 [2021-04-15 02:38:04,286 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 2371 DAG size of output: 3478 [2021-04-15 02:38:04,441 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 2224 DAG size of output: 709 [2021-04-15 02:38:05,566 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 2095 DAG size of output: 1391 [2021-04-15 02:38:07,458 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 2383 DAG size of output: 1187 [2021-04-15 02:38:07,598 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 2383 DAG size of output: 1187 [2021-04-15 02:38:07,749 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 2388 DAG size of output: 1189 [2021-04-15 02:38:09,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:38:09,360 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:38:09,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:38:09,398 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:38:09,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:38:09,399 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-04-15 02:38:09,472 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:09,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:38:09,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:38:09,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026235948] [2021-04-15 02:38:09,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:38:09,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:38:09,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:38:09,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:38:09,473 INFO L87 Difference]: Start difference. First operand 2980 states and 8961 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:10,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:38:10,528 INFO L93 Difference]: Finished difference Result 3116 states and 9234 transitions. [2021-04-15 02:38:10,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:38:10,529 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:38:10,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:38:10,533 INFO L225 Difference]: With dead ends: 3116 [2021-04-15 02:38:10,534 INFO L226 Difference]: Without dead ends: 3097 [2021-04-15 02:38:10,534 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 922.7ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:38:10,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3097 states. [2021-04-15 02:38:10,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3097 to 2977. [2021-04-15 02:38:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 3.006048387096774) internal successors, (8946), 2976 states have internal predecessors, (8946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:10,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 8946 transitions. [2021-04-15 02:38:10,568 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 8946 transitions. Word has length 22 [2021-04-15 02:38:10,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:38:10,569 INFO L480 AbstractCegarLoop]: Abstraction has 2977 states and 8946 transitions. [2021-04-15 02:38:10,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:10,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 8946 transitions. [2021-04-15 02:38:10,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:38:10,571 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:38:10,571 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:38:10,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48353,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:10,785 INFO L428 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:38:10,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:38:10,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1033769778, now seen corresponding path program 405 times [2021-04-15 02:38:10,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:38:10,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994723529] [2021-04-15 02:38:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:38:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:38:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:11,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994723529] [2021-04-15 02:38:11,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021475268] [2021-04-15 02:38:11,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:11,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:38:11,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:38:11,090 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:38:11,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:38:12,212 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:38:12,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:38:12,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:38:17,365 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 1675 DAG size of output: 1046 [2021-04-15 02:38:17,503 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1902 DAG size of output: 1113 [2021-04-15 02:38:21,501 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 2137 DAG size of output: 1648 [2021-04-15 02:38:21,695 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 2265 DAG size of output: 1750 [2021-04-15 02:38:21,926 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 2636 DAG size of output: 1944 [2021-04-15 02:38:22,271 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 3743 DAG size of output: 2259 [2021-04-15 02:38:25,161 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 1532 DAG size of output: 1127 [2021-04-15 02:38:25,352 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 2023 DAG size of output: 1460 [2021-04-15 02:38:25,712 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 5354 DAG size of output: 2107 [2021-04-15 02:38:29,954 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 1762 DAG size of output: 1149 [2021-04-15 02:38:30,130 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 2332 DAG size of output: 1229 [2021-04-15 02:38:30,654 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 7255 DAG size of output: 2854 [2021-04-15 02:38:31,192 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 7255 DAG size of output: 2854 [2021-04-15 02:38:31,723 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 7264 DAG size of output: 2863 [2021-04-15 02:38:32,368 WARN L205 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 2865 DAG size of output: 3740 [2021-04-15 02:38:32,781 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 2461 DAG size of output: 2576 [2021-04-15 02:38:33,086 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 2310 DAG size of output: 2269 [2021-04-15 02:38:33,236 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 985 DAG size of output: 1099 [2021-04-15 02:38:34,631 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 1599 [2021-04-15 02:38:36,401 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 2101 DAG size of output: 640 [2021-04-15 02:38:36,520 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 2512 DAG size of output: 863 [2021-04-15 02:38:36,634 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 3917 DAG size of output: 739 [2021-04-15 02:38:36,752 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 3917 DAG size of output: 739 [2021-04-15 02:38:36,877 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 3921 DAG size of output: 743 [2021-04-15 02:38:37,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:38:37,951 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-04-15 02:38:37,952 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-04-15 02:38:37,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-04-15 02:38:40,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:38:40,392 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:38:40,394 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:38:40,430 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:38:40,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:38:40,432 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-04-15 02:38:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:40,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:38:40,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:38:40,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58927058] [2021-04-15 02:38:40,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:38:40,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:38:40,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:38:40,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:38:40,504 INFO L87 Difference]: Start difference. First operand 2977 states and 8946 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:41,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:38:41,825 INFO L93 Difference]: Finished difference Result 3066 states and 9136 transitions. [2021-04-15 02:38:41,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:38:41,827 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:38:41,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:38:41,831 INFO L225 Difference]: With dead ends: 3066 [2021-04-15 02:38:41,831 INFO L226 Difference]: Without dead ends: 3056 [2021-04-15 02:38:41,831 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1156.2ms TimeCoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:38:41,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-04-15 02:38:41,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2980. [2021-04-15 02:38:41,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2979 states have (on average 3.0060422960725077) internal successors, (8955), 2979 states have internal predecessors, (8955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 8955 transitions. [2021-04-15 02:38:41,865 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 8955 transitions. Word has length 22 [2021-04-15 02:38:41,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:38:41,865 INFO L480 AbstractCegarLoop]: Abstraction has 2980 states and 8955 transitions. [2021-04-15 02:38:41,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:41,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 8955 transitions. [2021-04-15 02:38:41,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:38:41,868 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:38:41,868 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:38:42,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52192 [2021-04-15 02:38:42,069 INFO L428 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:38:42,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:38:42,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1113853020, now seen corresponding path program 406 times [2021-04-15 02:38:42,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:38:42,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280697379] [2021-04-15 02:38:42,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:38:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:38:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:42,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280697379] [2021-04-15 02:38:42,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371711999] [2021-04-15 02:38:42,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:42,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:38:42,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:38:42,344 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:38:42,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:38:43,255 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:38:43,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:38:43,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:38:47,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:38:47,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:38:47,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:38:47,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-04-15 02:38:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:47,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:38:47,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:38:47,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028463107] [2021-04-15 02:38:47,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:38:47,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:38:47,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:38:47,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:38:47,018 INFO L87 Difference]: Start difference. First operand 2980 states and 8955 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:48,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:38:48,083 INFO L93 Difference]: Finished difference Result 3123 states and 9319 transitions. [2021-04-15 02:38:48,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:38:48,085 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:38:48,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:38:48,089 INFO L225 Difference]: With dead ends: 3123 [2021-04-15 02:38:48,089 INFO L226 Difference]: Without dead ends: 3107 [2021-04-15 02:38:48,089 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 861.4ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:38:48,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-04-15 02:38:48,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3031. [2021-04-15 02:38:48,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 3030 states have (on average 3.0145214521452144) internal successors, (9134), 3030 states have internal predecessors, (9134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 9134 transitions. [2021-04-15 02:38:48,126 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 9134 transitions. Word has length 22 [2021-04-15 02:38:48,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:38:48,126 INFO L480 AbstractCegarLoop]: Abstraction has 3031 states and 9134 transitions. [2021-04-15 02:38:48,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 9134 transitions. [2021-04-15 02:38:48,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:38:48,129 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:38:48,129 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:38:48,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56761 [2021-04-15 02:38:48,330 INFO L428 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:38:48,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:38:48,330 INFO L82 PathProgramCache]: Analyzing trace with hash -370269660, now seen corresponding path program 407 times [2021-04-15 02:38:48,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:38:48,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38628517] [2021-04-15 02:38:48,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:38:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:38:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:48,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38628517] [2021-04-15 02:38:48,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813962242] [2021-04-15 02:38:48,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:48,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:38:48,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:38:48,524 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:38:48,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:38:49,599 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:38:49,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:38:49,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:38:51,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:38:52,041 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-04-15 02:38:52,042 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-04-15 02:38:52,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-04-15 02:38:54,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:38:54,755 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:38:54,757 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:38:54,797 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:38:54,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:38:54,799 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-04-15 02:38:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:54,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:38:54,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:38:54,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853003896] [2021-04-15 02:38:54,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:38:54,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:38:54,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:38:54,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:38:54,880 INFO L87 Difference]: Start difference. First operand 3031 states and 9134 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:56,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:38:56,773 INFO L93 Difference]: Finished difference Result 3229 states and 9558 transitions. [2021-04-15 02:38:56,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:38:56,774 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:38:56,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:38:56,779 INFO L225 Difference]: With dead ends: 3229 [2021-04-15 02:38:56,779 INFO L226 Difference]: Without dead ends: 3203 [2021-04-15 02:38:56,779 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1257.3ms TimeCoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:38:56,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3203 states. [2021-04-15 02:38:56,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3203 to 3035. [2021-04-15 02:38:56,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3035 states, 3034 states have (on average 3.0141727092946606) internal successors, (9145), 3034 states have internal predecessors, (9145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3035 states to 3035 states and 9145 transitions. [2021-04-15 02:38:56,817 INFO L78 Accepts]: Start accepts. Automaton has 3035 states and 9145 transitions. Word has length 22 [2021-04-15 02:38:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:38:56,817 INFO L480 AbstractCegarLoop]: Abstraction has 3035 states and 9145 transitions. [2021-04-15 02:38:56,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:38:56,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3035 states and 9145 transitions. [2021-04-15 02:38:56,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:38:56,820 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:38:56,820 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:38:57,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57674,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:57,020 INFO L428 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:38:57,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:38:57,021 INFO L82 PathProgramCache]: Analyzing trace with hash 480874472, now seen corresponding path program 408 times [2021-04-15 02:38:57,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:38:57,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16654869] [2021-04-15 02:38:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:38:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:38:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:38:57,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16654869] [2021-04-15 02:38:57,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35764946] [2021-04-15 02:38:57,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:38:57,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:38:57,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:38:57,216 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:38:57,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:38:58,271 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:38:58,272 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:38:58,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:39:00,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:39:00,872 INFO L244 Elim1Store]: Index analysis took 103 ms [2021-04-15 02:39:01,665 WARN L205 SmtUtils]: Spent 791.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-04-15 02:39:01,666 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-04-15 02:39:01,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-04-15 02:39:03,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:39:03,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:39:03,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:39:03,857 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:39:03,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:39:03,859 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-04-15 02:39:03,944 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:03,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:39:03,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:39:03,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972048048] [2021-04-15 02:39:03,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:39:03,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:03,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:39:03,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:39:03,945 INFO L87 Difference]: Start difference. First operand 3035 states and 9145 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:05,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:05,315 INFO L93 Difference]: Finished difference Result 3128 states and 9349 transitions. [2021-04-15 02:39:05,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:39:05,315 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:39:05,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:05,319 INFO L225 Difference]: With dead ends: 3128 [2021-04-15 02:39:05,319 INFO L226 Difference]: Without dead ends: 3118 [2021-04-15 02:39:05,319 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1116.8ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:39:05,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3118 states. [2021-04-15 02:39:05,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3118 to 3041. [2021-04-15 02:39:05,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3041 states, 3040 states have (on average 3.014144736842105) internal successors, (9163), 3040 states have internal predecessors, (9163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:05,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 9163 transitions. [2021-04-15 02:39:05,350 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 9163 transitions. Word has length 22 [2021-04-15 02:39:05,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:05,350 INFO L480 AbstractCegarLoop]: Abstraction has 3041 states and 9163 transitions. [2021-04-15 02:39:05,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:05,350 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 9163 transitions. [2021-04-15 02:39:05,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:05,353 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:05,353 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:39:05,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58709,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:39:05,553 INFO L428 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:05,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:05,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1096538788, now seen corresponding path program 409 times [2021-04-15 02:39:05,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:05,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208517493] [2021-04-15 02:39:05,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:05,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208517493] [2021-04-15 02:39:05,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267498953] [2021-04-15 02:39:05,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:39:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:05,855 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:39:05,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:39:06,888 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:39:06,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:39:06,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:39:12,467 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 2400 DAG size of output: 1074 [2021-04-15 02:39:14,756 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 3714 DAG size of output: 1210 [2021-04-15 02:39:20,280 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 2861 DAG size of output: 1190 [2021-04-15 02:39:20,601 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 6123 DAG size of output: 1991 [2021-04-15 02:39:20,890 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 6123 DAG size of output: 1991 [2021-04-15 02:39:21,207 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 6132 DAG size of output: 2000 [2021-04-15 02:39:21,382 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 1997 DAG size of output: 1849 [2021-04-15 02:39:21,578 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 1851 DAG size of output: 2027 [2021-04-15 02:39:23,272 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 2006 DAG size of output: 964 [2021-04-15 02:39:23,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:39:24,776 WARN L205 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-04-15 02:39:24,777 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-04-15 02:39:24,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-04-15 02:39:30,834 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 828 DAG size of output: 714 [2021-04-15 02:39:30,942 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 955 DAG size of output: 832 [2021-04-15 02:39:31,056 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 974 DAG size of output: 849 [2021-04-15 02:39:34,382 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 886 DAG size of output: 831 [2021-04-15 02:39:34,501 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 942 DAG size of output: 870 [2021-04-15 02:39:34,738 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 1638 DAG size of output: 1529 [2021-04-15 02:39:35,073 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 2132 DAG size of output: 1902 [2021-04-15 02:39:35,413 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 2192 DAG size of output: 1955 [2021-04-15 02:39:41,168 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1058 DAG size of output: 803 [2021-04-15 02:39:41,322 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 1249 DAG size of output: 988 [2021-04-15 02:39:41,498 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 1291 DAG size of output: 1021 [2021-04-15 02:39:41,704 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 1657 DAG size of output: 1222 [2021-04-15 02:39:41,949 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 1710 DAG size of output: 1276 [2021-04-15 02:39:42,508 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 3422 DAG size of output: 2780 [2021-04-15 02:39:43,083 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 3422 DAG size of output: 2780 [2021-04-15 02:39:43,731 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 3430 DAG size of output: 2612 [2021-04-15 02:39:44,381 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 2614 DAG size of output: 3246 [2021-04-15 02:39:44,693 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 2342 DAG size of output: 2319 [2021-04-15 02:39:44,845 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1120 DAG size of output: 1120 [2021-04-15 02:39:45,017 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 1075 DAG size of output: 1151 [2021-04-15 02:39:45,125 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 857 DAG size of output: 878 [2021-04-15 02:39:45,332 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 666 DAG size of output: 883 [2021-04-15 02:39:48,190 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 1618 DAG size of output: 1046 [2021-04-15 02:39:48,342 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1634 DAG size of output: 1054 [2021-04-15 02:39:48,559 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 2719 DAG size of output: 1279 [2021-04-15 02:39:48,748 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 1793 DAG size of output: 1408 [2021-04-15 02:39:51,392 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1188 DAG size of output: 780 [2021-04-15 02:39:51,609 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1367 DAG size of output: 859 [2021-04-15 02:39:51,749 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 1961 DAG size of output: 1065 [2021-04-15 02:39:52,038 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 4169 DAG size of output: 1598 [2021-04-15 02:39:52,347 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 4169 DAG size of output: 1598 [2021-04-15 02:39:52,668 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 4174 DAG size of output: 1602 [2021-04-15 02:39:53,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:39:53,700 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:39:53,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:39:53,742 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:39:53,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:39:53,744 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-04-15 02:39:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:53,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:39:53,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:39:53,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079666834] [2021-04-15 02:39:53,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:39:53,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:53,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:39:53,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:39:53,825 INFO L87 Difference]: Start difference. First operand 3041 states and 9163 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:55,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:55,203 INFO L93 Difference]: Finished difference Result 3154 states and 9407 transitions. [2021-04-15 02:39:55,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:39:55,205 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:39:55,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:55,210 INFO L225 Difference]: With dead ends: 3154 [2021-04-15 02:39:55,210 INFO L226 Difference]: Without dead ends: 3144 [2021-04-15 02:39:55,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1357.1ms TimeCoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:39:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2021-04-15 02:39:55,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 3041. [2021-04-15 02:39:55,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3041 states, 3040 states have (on average 3.014144736842105) internal successors, (9163), 3040 states have internal predecessors, (9163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:55,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 9163 transitions. [2021-04-15 02:39:55,247 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 9163 transitions. Word has length 22 [2021-04-15 02:39:55,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:55,247 INFO L480 AbstractCegarLoop]: Abstraction has 3041 states and 9163 transitions. [2021-04-15 02:39:55,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:55,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 9163 transitions. [2021-04-15 02:39:55,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:55,250 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:55,250 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:39:55,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59631,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:39:55,451 INFO L428 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:55,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:55,452 INFO L82 PathProgramCache]: Analyzing trace with hash -227504460, now seen corresponding path program 410 times [2021-04-15 02:39:55,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:55,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866699987] [2021-04-15 02:39:55,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:39:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:39:55,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866699987] [2021-04-15 02:39:55,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792771164] [2021-04-15 02:39:55,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:39:55,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:39:55,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:39:55,714 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:39:55,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:39:56,598 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:39:56,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:39:56,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:39:59,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:39:59,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:39:59,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:39:59,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-04-15 02:39:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:39:59,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:39:59,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-04-15 02:39:59,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057167211] [2021-04-15 02:39:59,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 02:39:59,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:39:59,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 02:39:59,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:39:59,051 INFO L87 Difference]: Start difference. First operand 3041 states and 9163 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:59,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:39:59,670 INFO L93 Difference]: Finished difference Result 3072 states and 9207 transitions. [2021-04-15 02:39:59,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:39:59,671 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:39:59,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:39:59,675 INFO L225 Difference]: With dead ends: 3072 [2021-04-15 02:39:59,675 INFO L226 Difference]: Without dead ends: 3054 [2021-04-15 02:39:59,676 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 807.5ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:39:59,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3054 states. [2021-04-15 02:39:59,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3054 to 3041. [2021-04-15 02:39:59,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3041 states, 3040 states have (on average 3.013157894736842) internal successors, (9160), 3040 states have internal predecessors, (9160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 9160 transitions. [2021-04-15 02:39:59,711 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 9160 transitions. Word has length 22 [2021-04-15 02:39:59,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:39:59,711 INFO L480 AbstractCegarLoop]: Abstraction has 3041 states and 9160 transitions. [2021-04-15 02:39:59,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:39:59,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 9160 transitions. [2021-04-15 02:39:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:39:59,714 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:39:59,714 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:39:59,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67815 [2021-04-15 02:39:59,914 INFO L428 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:39:59,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:39:59,914 INFO L82 PathProgramCache]: Analyzing trace with hash 158696654, now seen corresponding path program 411 times [2021-04-15 02:39:59,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:39:59,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309054456] [2021-04-15 02:39:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:39:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:40:00,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309054456] [2021-04-15 02:40:00,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503157532] [2021-04-15 02:40:00,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:00,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:40:00,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:00,085 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:40:00,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:01,183 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:40:01,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:40:01,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:40:05,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:40:05,612 INFO L244 Elim1Store]: Index analysis took 115 ms [2021-04-15 02:40:06,451 WARN L205 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-04-15 02:40:06,452 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-04-15 02:40:06,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-04-15 02:40:11,737 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 1682 DAG size of output: 1421 [2021-04-15 02:40:15,652 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 1864 DAG size of output: 1579 [2021-04-15 02:40:16,079 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 3034 DAG size of output: 2545 [2021-04-15 02:40:16,563 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 3283 DAG size of output: 2759 [2021-04-15 02:40:17,021 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 3283 DAG size of output: 2759 [2021-04-15 02:40:17,527 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 3291 DAG size of output: 2676 [2021-04-15 02:40:18,053 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 2678 DAG size of output: 2677 [2021-04-15 02:40:18,300 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 1905 DAG size of output: 1378 [2021-04-15 02:40:18,483 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 920 DAG size of output: 1147 [2021-04-15 02:40:19,907 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1532 DAG size of output: 845 [2021-04-15 02:40:20,138 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 1975 DAG size of output: 1073 [2021-04-15 02:40:20,358 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 1333 DAG size of output: 1302 [2021-04-15 02:40:20,541 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1123 DAG size of output: 1282 [2021-04-15 02:40:20,759 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 1081 DAG size of output: 1460 [2021-04-15 02:40:23,649 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 1759 DAG size of output: 980 [2021-04-15 02:40:24,248 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 3776 DAG size of output: 1133 [2021-04-15 02:40:24,460 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 3776 DAG size of output: 1133 [2021-04-15 02:40:24,693 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 3781 DAG size of output: 1144 [2021-04-15 02:40:24,831 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 1146 DAG size of output: 852 [2021-04-15 02:40:25,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:40:25,527 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:40:25,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:40:25,573 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:40:25,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:40:25,574 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-04-15 02:40:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:25,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:25,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-04-15 02:40:25,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184901419] [2021-04-15 02:40:25,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:40:25,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:25,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:40:25,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:40:25,652 INFO L87 Difference]: Start difference. First operand 3041 states and 9160 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:27,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:27,262 INFO L93 Difference]: Finished difference Result 3182 states and 9450 transitions. [2021-04-15 02:40:27,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:40:27,263 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:40:27,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:27,266 INFO L225 Difference]: With dead ends: 3182 [2021-04-15 02:40:27,267 INFO L226 Difference]: Without dead ends: 3172 [2021-04-15 02:40:27,267 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1106.6ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:40:27,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3172 states. [2021-04-15 02:40:27,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3172 to 3040. [2021-04-15 02:40:27,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3040 states, 3039 states have (on average 3.013162224415926) internal successors, (9157), 3039 states have internal predecessors, (9157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:27,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3040 states to 3040 states and 9157 transitions. [2021-04-15 02:40:27,294 INFO L78 Accepts]: Start accepts. Automaton has 3040 states and 9157 transitions. Word has length 22 [2021-04-15 02:40:27,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:27,294 INFO L480 AbstractCegarLoop]: Abstraction has 3040 states and 9157 transitions. [2021-04-15 02:40:27,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand 3040 states and 9157 transitions. [2021-04-15 02:40:27,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:40:27,296 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:27,296 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:40:27,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68408 [2021-04-15 02:40:27,497 INFO L428 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:27,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:27,497 INFO L82 PathProgramCache]: Analyzing trace with hash 696552232, now seen corresponding path program 412 times [2021-04-15 02:40:27,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:27,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818003933] [2021-04-15 02:40:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:27,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818003933] [2021-04-15 02:40:27,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674323590] [2021-04-15 02:40:27,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:27,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:40:27,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:27,810 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:40:27,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:28,970 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:40:28,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:40:28,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:40:31,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:40:31,495 INFO L244 Elim1Store]: Index analysis took 109 ms [2021-04-15 02:40:32,335 WARN L205 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-04-15 02:40:32,336 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-04-15 02:40:32,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-04-15 02:40:38,281 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1487 DAG size of output: 1156 [2021-04-15 02:40:38,501 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 2121 DAG size of output: 1597 [2021-04-15 02:40:38,702 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 2131 DAG size of output: 1605 [2021-04-15 02:40:38,907 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 2131 DAG size of output: 1605 [2021-04-15 02:40:39,119 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 2137 DAG size of output: 1607 [2021-04-15 02:40:39,321 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 1609 DAG size of output: 1810 [2021-04-15 02:40:39,570 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 1558 DAG size of output: 1181 [2021-04-15 02:40:42,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:40:42,557 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:40:42,559 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:40:42,599 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:40:42,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:40:42,600 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-04-15 02:40:42,681 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:42,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:42,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:40:42,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161422466] [2021-04-15 02:40:42,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:40:42,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:42,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:40:42,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:40:42,682 INFO L87 Difference]: Start difference. First operand 3040 states and 9157 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:44,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:44,528 INFO L93 Difference]: Finished difference Result 3274 states and 9666 transitions. [2021-04-15 02:40:44,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 02:40:44,530 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:40:44,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:44,535 INFO L225 Difference]: With dead ends: 3274 [2021-04-15 02:40:44,535 INFO L226 Difference]: Without dead ends: 3245 [2021-04-15 02:40:44,535 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1582.3ms TimeCoverageRelationStatistics Valid=197, Invalid=1525, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:40:44,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2021-04-15 02:40:44,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 3029. [2021-04-15 02:40:44,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3028 states have (on average 3.010568031704095) internal successors, (9116), 3028 states have internal predecessors, (9116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 9116 transitions. [2021-04-15 02:40:44,573 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 9116 transitions. Word has length 22 [2021-04-15 02:40:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:44,573 INFO L480 AbstractCegarLoop]: Abstraction has 3029 states and 9116 transitions. [2021-04-15 02:40:44,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:44,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 9116 transitions. [2021-04-15 02:40:44,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:40:44,577 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:44,577 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:40:44,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71738,421 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:44,777 INFO L428 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:44,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:44,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1312216548, now seen corresponding path program 413 times [2021-04-15 02:40:44,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:44,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608047662] [2021-04-15 02:40:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:45,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608047662] [2021-04-15 02:40:45,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57059497] [2021-04-15 02:40:45,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:45,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:40:45,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:45,061 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:40:45,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:46,277 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:40:46,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:40:46,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:40:48,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:40:49,683 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-04-15 02:40:49,684 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-04-15 02:40:49,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-04-15 02:40:51,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:40:51,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:40:51,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:40:51,809 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:40:51,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:40:51,811 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-04-15 02:40:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:51,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:40:51,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:40:51,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516988763] [2021-04-15 02:40:51,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:40:51,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:40:51,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:40:51,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:40:51,898 INFO L87 Difference]: Start difference. First operand 3029 states and 9116 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:40:53,374 INFO L93 Difference]: Finished difference Result 3167 states and 9407 transitions. [2021-04-15 02:40:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:40:53,376 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:40:53,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:40:53,380 INFO L225 Difference]: With dead ends: 3167 [2021-04-15 02:40:53,380 INFO L226 Difference]: Without dead ends: 3157 [2021-04-15 02:40:53,380 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1384.8ms TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:40:53,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2021-04-15 02:40:53,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 3029. [2021-04-15 02:40:53,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3028 states have (on average 3.010568031704095) internal successors, (9116), 3028 states have internal predecessors, (9116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 9116 transitions. [2021-04-15 02:40:53,416 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 9116 transitions. Word has length 22 [2021-04-15 02:40:53,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:40:53,417 INFO L480 AbstractCegarLoop]: Abstraction has 3029 states and 9116 transitions. [2021-04-15 02:40:53,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:40:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 9116 transitions. [2021-04-15 02:40:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:40:53,420 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:40:53,420 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:40:53,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73928,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:53,620 INFO L428 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:40:53,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:40:53,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1404521526, now seen corresponding path program 414 times [2021-04-15 02:40:53,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:40:53,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51534323] [2021-04-15 02:40:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:40:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:40:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:40:53,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51534323] [2021-04-15 02:40:53,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488202654] [2021-04-15 02:40:53,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:40:53,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:40:53,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:40:53,953 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:40:53,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:40:55,037 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:40:55,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:40:55,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:41:02,266 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1452 DAG size of output: 1087 [2021-04-15 02:41:02,469 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 2302 DAG size of output: 1617 [2021-04-15 02:41:02,673 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 2302 DAG size of output: 1617 [2021-04-15 02:41:02,910 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 2308 DAG size of output: 1623 [2021-04-15 02:41:03,107 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 1625 DAG size of output: 1715 [2021-04-15 02:41:03,230 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1317 DAG size of output: 1255 [2021-04-15 02:41:05,158 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1774 DAG size of output: 886 [2021-04-15 02:41:06,017 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 2299 DAG size of output: 1260 [2021-04-15 02:41:06,172 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 2299 DAG size of output: 1260 [2021-04-15 02:41:06,330 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 2304 DAG size of output: 1265 [2021-04-15 02:41:07,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:41:07,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:41:07,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:41:07,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-04-15 02:41:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:07,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:41:07,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:41:07,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112540751] [2021-04-15 02:41:07,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:41:07,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:41:07,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:41:07,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:41:07,833 INFO L87 Difference]: Start difference. First operand 3029 states and 9116 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:09,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:09,317 INFO L93 Difference]: Finished difference Result 3185 states and 9526 transitions. [2021-04-15 02:41:09,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:41:09,318 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:41:09,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:09,322 INFO L225 Difference]: With dead ends: 3185 [2021-04-15 02:41:09,322 INFO L226 Difference]: Without dead ends: 3167 [2021-04-15 02:41:09,322 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1060.2ms TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:41:09,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2021-04-15 02:41:09,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 3093. [2021-04-15 02:41:09,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3093 states, 3092 states have (on average 3.0197283311772316) internal successors, (9337), 3092 states have internal predecessors, (9337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:09,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 9337 transitions. [2021-04-15 02:41:09,361 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 9337 transitions. Word has length 22 [2021-04-15 02:41:09,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:09,361 INFO L480 AbstractCegarLoop]: Abstraction has 3093 states and 9337 transitions. [2021-04-15 02:41:09,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:09,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 9337 transitions. [2021-04-15 02:41:09,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:41:09,365 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:09,365 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:41:09,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74966 [2021-04-15 02:41:09,565 INFO L428 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:09,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:09,565 INFO L82 PathProgramCache]: Analyzing trace with hash -660938166, now seen corresponding path program 415 times [2021-04-15 02:41:09,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:09,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503183595] [2021-04-15 02:41:09,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:41:09,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503183595] [2021-04-15 02:41:09,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958161460] [2021-04-15 02:41:09,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:09,839 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:41:09,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:10,797 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:41:10,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:41:10,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:41:16,807 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 1741 DAG size of output: 1125 [2021-04-15 02:41:18,436 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 2194 DAG size of output: 1485 [2021-04-15 02:41:22,782 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1633 DAG size of output: 1073 [2021-04-15 02:41:22,967 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 2084 DAG size of output: 1316 [2021-04-15 02:41:23,309 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 3741 DAG size of output: 2329 [2021-04-15 02:41:23,683 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 3848 DAG size of output: 2424 [2021-04-15 02:41:24,133 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 4425 DAG size of output: 2785 [2021-04-15 02:41:24,551 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 4425 DAG size of output: 2785 [2021-04-15 02:41:25,007 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 4431 DAG size of output: 2791 [2021-04-15 02:41:25,249 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 2792 DAG size of output: 2674 [2021-04-15 02:41:25,491 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 2253 DAG size of output: 2091 [2021-04-15 02:41:26,621 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 1733 DAG size of output: 1982 [2021-04-15 02:41:26,741 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 1342 DAG size of output: 1141 [2021-04-15 02:41:28,035 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 2213 DAG size of output: 1005 [2021-04-15 02:41:28,150 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 2213 DAG size of output: 1005 [2021-04-15 02:41:28,263 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 2218 DAG size of output: 1010 [2021-04-15 02:41:28,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:41:29,895 WARN L205 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-04-15 02:41:29,896 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-04-15 02:41:29,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-04-15 02:41:35,689 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 1725 DAG size of output: 1014 [2021-04-15 02:41:38,824 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1062 DAG size of output: 938 [2021-04-15 02:41:38,960 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 1244 DAG size of output: 1049 [2021-04-15 02:41:39,118 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 1423 DAG size of output: 1225 [2021-04-15 02:41:41,117 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1288 DAG size of output: 1001 [2021-04-15 02:41:41,235 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1482 DAG size of output: 1118 [2021-04-15 02:41:41,381 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1663 DAG size of output: 1295 [2021-04-15 02:41:41,641 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 2674 DAG size of output: 1730 [2021-04-15 02:41:41,911 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 2709 DAG size of output: 1760 [2021-04-15 02:41:42,349 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 4014 DAG size of output: 2391 [2021-04-15 02:41:42,780 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 4014 DAG size of output: 2391 [2021-04-15 02:41:43,242 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 4020 DAG size of output: 2393 [2021-04-15 02:41:43,546 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 2395 DAG size of output: 1874 [2021-04-15 02:41:44,055 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 1816 DAG size of output: 2040 [2021-04-15 02:41:44,191 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1080 DAG size of output: 995 [2021-04-15 02:41:45,194 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 877 DAG size of output: 923 [2021-04-15 02:41:46,909 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 1429 DAG size of output: 1419 [2021-04-15 02:41:50,511 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 1837 DAG size of output: 1037 [2021-04-15 02:41:50,806 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 2684 DAG size of output: 1544 [2021-04-15 02:41:51,069 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 2796 DAG size of output: 1600 [2021-04-15 02:41:51,340 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 2796 DAG size of output: 1600 [2021-04-15 02:41:51,639 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 2799 DAG size of output: 1602 [2021-04-15 02:41:51,874 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 1604 DAG size of output: 1386 [2021-04-15 02:41:53,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:41:53,010 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:41:53,012 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:41:53,055 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:41:53,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:41:53,057 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-04-15 02:41:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:53,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:41:53,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:41:53,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434533148] [2021-04-15 02:41:53,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:41:53,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:41:53,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:41:53,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:41:53,147 INFO L87 Difference]: Start difference. First operand 3093 states and 9337 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:55,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:41:55,354 INFO L93 Difference]: Finished difference Result 3353 states and 9932 transitions. [2021-04-15 02:41:55,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 02:41:55,355 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:41:55,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:41:55,360 INFO L225 Difference]: With dead ends: 3353 [2021-04-15 02:41:55,360 INFO L226 Difference]: Without dead ends: 3327 [2021-04-15 02:41:55,361 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1325.2ms TimeCoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:41:55,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2021-04-15 02:41:55,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 3101. [2021-04-15 02:41:55,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 3.020967741935484) internal successors, (9365), 3100 states have internal predecessors, (9365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 9365 transitions. [2021-04-15 02:41:55,403 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 9365 transitions. Word has length 22 [2021-04-15 02:41:55,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:41:55,403 INFO L480 AbstractCegarLoop]: Abstraction has 3101 states and 9365 transitions. [2021-04-15 02:41:55,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:41:55,403 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 9365 transitions. [2021-04-15 02:41:55,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:41:55,406 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:41:55,406 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:41:55,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77433,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:55,607 INFO L428 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:41:55,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:41:55,607 INFO L82 PathProgramCache]: Analyzing trace with hash 190205966, now seen corresponding path program 416 times [2021-04-15 02:41:55,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:41:55,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510835235] [2021-04-15 02:41:55,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:41:55,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:41:55,934 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:41:55,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510835235] [2021-04-15 02:41:55,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513708732] [2021-04-15 02:41:55,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:41:55,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:41:55,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:41:55,955 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:41:55,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:41:57,219 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:41:57,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:41:57,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:42:00,362 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 1700 DAG size of output: 1052 [2021-04-15 02:42:00,476 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1700 DAG size of output: 1052 [2021-04-15 02:42:00,595 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1709 DAG size of output: 1061 [2021-04-15 02:42:02,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:42:02,393 INFO L244 Elim1Store]: Index analysis took 116 ms [2021-04-15 02:42:03,194 WARN L205 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-04-15 02:42:03,195 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-04-15 02:42:03,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-04-15 02:42:06,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:42:06,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:42:06,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:42:06,300 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:42:06,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:42:06,302 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-04-15 02:42:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:42:06,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:42:06,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:42:06,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865314421] [2021-04-15 02:42:06,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:42:06,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:42:06,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:42:06,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:42:06,388 INFO L87 Difference]: Start difference. First operand 3101 states and 9365 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:09,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:42:09,420 INFO L93 Difference]: Finished difference Result 3506 states and 10303 transitions. [2021-04-15 02:42:09,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 02:42:09,422 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:42:09,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:42:09,427 INFO L225 Difference]: With dead ends: 3506 [2021-04-15 02:42:09,427 INFO L226 Difference]: Without dead ends: 3464 [2021-04-15 02:42:09,427 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2103.1ms TimeCoverageRelationStatistics Valid=266, Invalid=1990, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 02:42:09,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-04-15 02:42:09,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 3097. [2021-04-15 02:42:09,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3097 states, 3096 states have (on average 3.0180878552971575) internal successors, (9344), 3096 states have internal predecessors, (9344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:09,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 9344 transitions. [2021-04-15 02:42:09,469 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 9344 transitions. Word has length 22 [2021-04-15 02:42:09,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:42:09,469 INFO L480 AbstractCegarLoop]: Abstraction has 3097 states and 9344 transitions. [2021-04-15 02:42:09,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:09,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 9344 transitions. [2021-04-15 02:42:09,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:42:09,472 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:42:09,472 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:42:09,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83939,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:42:09,672 INFO L428 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:42:09,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:42:09,673 INFO L82 PathProgramCache]: Analyzing trace with hash 805870282, now seen corresponding path program 417 times [2021-04-15 02:42:09,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:42:09,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292608409] [2021-04-15 02:42:09,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:42:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:42:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:42:09,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292608409] [2021-04-15 02:42:09,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056815463] [2021-04-15 02:42:09,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:42:09,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:42:09,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:42:09,981 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:42:09,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:42:11,260 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:42:11,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:42:11,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:42:13,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:42:13,579 INFO L244 Elim1Store]: Index analysis took 107 ms [2021-04-15 02:42:14,181 WARN L205 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-04-15 02:42:14,181 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-04-15 02:42:14,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-04-15 02:42:16,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:42:16,321 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:42:16,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:42:16,356 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:42:16,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:42:16,358 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-04-15 02:42:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:42:16,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:42:16,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:42:16,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124604516] [2021-04-15 02:42:16,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:42:16,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:42:16,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:42:16,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:42:16,421 INFO L87 Difference]: Start difference. First operand 3097 states and 9344 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:17,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:42:17,616 INFO L93 Difference]: Finished difference Result 3262 states and 9709 transitions. [2021-04-15 02:42:17,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:42:17,618 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:42:17,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:42:17,622 INFO L225 Difference]: With dead ends: 3262 [2021-04-15 02:42:17,622 INFO L226 Difference]: Without dead ends: 3252 [2021-04-15 02:42:17,622 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1514.1ms TimeCoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:42:17,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3252 states. [2021-04-15 02:42:17,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3252 to 3102. [2021-04-15 02:42:17,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3101 states have (on average 3.018058690744921) internal successors, (9359), 3101 states have internal predecessors, (9359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:17,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 9359 transitions. [2021-04-15 02:42:17,660 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 9359 transitions. Word has length 22 [2021-04-15 02:42:17,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:42:17,660 INFO L480 AbstractCegarLoop]: Abstraction has 3102 states and 9359 transitions. [2021-04-15 02:42:17,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:17,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 9359 transitions. [2021-04-15 02:42:17,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:42:17,663 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:42:17,663 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:42:17,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85405,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:42:17,864 INFO L428 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:42:17,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:42:17,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1583372402, now seen corresponding path program 418 times [2021-04-15 02:42:17,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:42:17,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994251030] [2021-04-15 02:42:17,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:42:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:42:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:42:18,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994251030] [2021-04-15 02:42:18,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654115133] [2021-04-15 02:42:18,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:42:18,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:42:18,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:42:18,238 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:42:18,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:42:19,564 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:42:19,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:42:19,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:42:21,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:42:22,640 WARN L205 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-04-15 02:42:22,641 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-04-15 02:42:22,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-04-15 02:42:27,297 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1225 DAG size of output: 828 [2021-04-15 02:42:28,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:42:28,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:42:28,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:42:28,479 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:42:28,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:42:28,481 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-04-15 02:42:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:42:28,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:42:28,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-04-15 02:42:28,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492025377] [2021-04-15 02:42:28,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:42:28,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:42:28,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:42:28,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:42:28,564 INFO L87 Difference]: Start difference. First operand 3102 states and 9359 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:30,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:42:30,028 INFO L93 Difference]: Finished difference Result 3292 states and 9780 transitions. [2021-04-15 02:42:30,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:42:30,030 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:42:30,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:42:30,034 INFO L225 Difference]: With dead ends: 3292 [2021-04-15 02:42:30,034 INFO L226 Difference]: Without dead ends: 3282 [2021-04-15 02:42:30,035 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1765.9ms TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:42:30,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2021-04-15 02:42:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 3102. [2021-04-15 02:42:30,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3101 states have (on average 3.018058690744921) internal successors, (9359), 3101 states have internal predecessors, (9359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:30,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 9359 transitions. [2021-04-15 02:42:30,101 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 9359 transitions. Word has length 22 [2021-04-15 02:42:30,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:42:30,101 INFO L480 AbstractCegarLoop]: Abstraction has 3102 states and 9359 transitions. [2021-04-15 02:42:30,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:30,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 9359 transitions. [2021-04-15 02:42:30,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:42:30,105 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:42:30,105 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:42:30,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86327 [2021-04-15 02:42:30,305 INFO L428 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:42:30,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:42:30,307 INFO L82 PathProgramCache]: Analyzing trace with hash -2131428492, now seen corresponding path program 419 times [2021-04-15 02:42:30,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:42:30,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876048638] [2021-04-15 02:42:30,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:42:30,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:42:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:42:30,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876048638] [2021-04-15 02:42:30,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828634530] [2021-04-15 02:42:30,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:42:30,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:42:30,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:42:30,578 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:42:30,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:42:31,758 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:42:31,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:42:31,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:42:34,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:42:34,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:42:34,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:42:34,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-04-15 02:42:34,037 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:42:34,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:42:34,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-04-15 02:42:34,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701852160] [2021-04-15 02:42:34,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 02:42:34,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:42:34,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 02:42:34,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:42:34,037 INFO L87 Difference]: Start difference. First operand 3102 states and 9359 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:34,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:42:34,735 INFO L93 Difference]: Finished difference Result 3132 states and 9402 transitions. [2021-04-15 02:42:34,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:42:34,737 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:42:34,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:42:34,741 INFO L225 Difference]: With dead ends: 3132 [2021-04-15 02:42:34,741 INFO L226 Difference]: Without dead ends: 3114 [2021-04-15 02:42:34,741 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1076.8ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:42:34,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3114 states. [2021-04-15 02:42:34,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3114 to 3102. [2021-04-15 02:42:34,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3101 states have (on average 3.016768784263141) internal successors, (9355), 3101 states have internal predecessors, (9355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:34,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 9355 transitions. [2021-04-15 02:42:34,779 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 9355 transitions. Word has length 22 [2021-04-15 02:42:34,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:42:34,779 INFO L480 AbstractCegarLoop]: Abstraction has 3102 states and 9355 transitions. [2021-04-15 02:42:34,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:42:34,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 9355 transitions. [2021-04-15 02:42:34,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:42:34,782 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:42:34,782 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:42:34,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87738 [2021-04-15 02:42:34,982 INFO L428 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:42:34,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:42:34,983 INFO L82 PathProgramCache]: Analyzing trace with hash -591707484, now seen corresponding path program 420 times [2021-04-15 02:42:34,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:42:34,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76077332] [2021-04-15 02:42:34,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:42:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:42:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:42:35,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76077332] [2021-04-15 02:42:35,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088645650] [2021-04-15 02:42:35,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:42:35,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:42:35,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:42:35,258 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:42:35,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:42:36,559 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:42:36,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:42:36,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:42:42,066 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 1109 DAG size of output: 904 [2021-04-15 02:42:42,204 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 1460 DAG size of output: 1180 [2021-04-15 02:42:46,264 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 1156 DAG size of output: 801 [2021-04-15 02:42:46,388 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1432 DAG size of output: 969 [2021-04-15 02:42:46,653 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 2449 DAG size of output: 1824 [2021-04-15 02:42:46,946 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 2737 DAG size of output: 1862 [2021-04-15 02:42:47,295 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 2989 DAG size of output: 2041 [2021-04-15 02:42:47,614 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 2989 DAG size of output: 2041 [2021-04-15 02:42:47,947 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 2998 DAG size of output: 2050 [2021-04-15 02:42:48,351 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 2052 DAG size of output: 2634 [2021-04-15 02:42:48,567 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 1896 DAG size of output: 1684 [2021-04-15 02:42:48,760 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 1537 DAG size of output: 1451 [2021-04-15 02:42:49,597 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 1399 DAG size of output: 1626 [2021-04-15 02:42:53,058 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 2097 DAG size of output: 1034 [2021-04-15 02:42:53,316 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 3208 DAG size of output: 1072 [2021-04-15 02:42:53,512 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 3208 DAG size of output: 1072 [2021-04-15 02:42:53,678 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 3212 DAG size of output: 1076 [2021-04-15 02:42:55,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:42:55,355 INFO L244 Elim1Store]: Index analysis took 120 ms [2021-04-15 02:42:56,074 WARN L205 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-04-15 02:42:56,075 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-04-15 02:42:56,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-04-15 02:43:01,726 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 1765 DAG size of output: 1183 [2021-04-15 02:43:01,957 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 1765 DAG size of output: 1183 [2021-04-15 02:43:02,176 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 1771 DAG size of output: 1178 [2021-04-15 02:43:02,370 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 1180 DAG size of output: 1236 [2021-04-15 02:43:02,570 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 1152 DAG size of output: 1248 [2021-04-15 02:43:05,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 02:43:05,287 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 02:43:05,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 02:43:05,352 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-04-15 02:43:05,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 02:43:05,355 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-04-15 02:43:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:43:05,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:43:05,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-04-15 02:43:05,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130110006] [2021-04-15 02:43:05,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 02:43:05,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:43:05,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 02:43:05,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:43:05,479 INFO L87 Difference]: Start difference. First operand 3102 states and 9355 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:43:07,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:43:07,598 INFO L93 Difference]: Finished difference Result 3405 states and 10085 transitions. [2021-04-15 02:43:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:43:07,599 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:43:07,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:43:07,604 INFO L225 Difference]: With dead ends: 3405 [2021-04-15 02:43:07,604 INFO L226 Difference]: Without dead ends: 3395 [2021-04-15 02:43:07,604 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1691.6ms TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:43:07,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-04-15 02:43:07,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 3101. [2021-04-15 02:43:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 3.016774193548387) internal successors, (9352), 3100 states have internal predecessors, (9352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:43:07,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 9352 transitions. [2021-04-15 02:43:07,649 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 9352 transitions. Word has length 22 [2021-04-15 02:43:07,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:43:07,650 INFO L480 AbstractCegarLoop]: Abstraction has 3101 states and 9352 transitions. [2021-04-15 02:43:07,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:43:07,650 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 9352 transitions. [2021-04-15 02:43:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:43:07,653 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:43:07,653 INFO L551 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:43:07,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88183 [2021-04-15 02:43:07,854 INFO L428 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:43:07,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:43:07,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1098053750, now seen corresponding path program 421 times [2021-04-15 02:43:07,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:43:07,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144100169] [2021-04-15 02:43:07,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:43:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:43:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:43:08,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144100169] [2021-04-15 02:43:08,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582518948] [2021-04-15 02:43:08,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:43:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:43:08,130 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 02:43:08,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:43:09,308 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-04-15 02:43:09,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:43:09,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-04-15 02:43:12,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:43:12,785 INFO L244 Elim1Store]: Index analysis took 127 ms [2021-04-15 02:43:13,685 WARN L205 SmtUtils]: Spent 898.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-04-15 02:43:13,686 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-04-15 02:43:13,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-04-15 02:43:17,960 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 892 DAG size of output: 729 [2021-04-15 02:43:18,082 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1077 DAG size of output: 876 [2021-04-15 02:43:18,204 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1077 DAG size of output: 876 [2021-04-15 02:43:18,356 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 1083 DAG size of output: 882 [2021-04-15 02:43:18,466 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 884 DAG size of output: 1006 Received shutdown request... [2021-04-15 02:43:19,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92679,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:43:19,747 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 02:43:19,750 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 02:43:19,750 INFO L202 PluginConnector]: Adding new model unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 02:43:19 BasicIcfg [2021-04-15 02:43:19,750 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 02:43:19,751 INFO L168 Benchmark]: Toolchain (without parser) took 858439.86 ms. Allocated memory was 255.9 MB in the beginning and 2.4 GB in the end (delta: 2.1 GB). Free memory was 236.1 MB in the beginning and 2.1 GB in the end (delta: -1.9 GB). Peak memory consumption was 1.5 GB. Max. memory is 16.0 GB. [2021-04-15 02:43:19,751 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:43:19,751 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.56 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 02:43:19,751 INFO L168 Benchmark]: Boogie Preprocessor took 23.38 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.5 MB in the end (delta: 950.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 02:43:19,751 INFO L168 Benchmark]: RCFGBuilder took 445.28 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 235.5 MB in the end (delta: -1.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.0 GB. [2021-04-15 02:43:19,751 INFO L168 Benchmark]: TraceAbstraction took 857936.15 ms. Allocated memory was 255.9 MB in the beginning and 2.4 GB in the end (delta: 2.1 GB). Free memory was 235.0 MB in the beginning and 2.1 GB in the end (delta: -1.9 GB). Peak memory consumption was 1.5 GB. Max. memory is 16.0 GB. [2021-04-15 02:43:19,751 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.56 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 23.38 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.5 MB in the end (delta: 950.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 445.28 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 235.5 MB in the end (delta: -1.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 857936.15 ms. Allocated memory was 255.9 MB in the beginning and 2.4 GB in the end (delta: 2.1 GB). Free memory was 235.0 MB in the beginning and 2.1 GB in the end (delta: -1.9 GB). Peak memory consumption was 1.5 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 61). Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 857833.0ms, OverallIterations: 433, TraceHistogramMax: 9, EmptinessCheckTime: 577.4ms, AutomataDifference: 182702.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9103 SDtfs, 23192 SDslu, 72777 SDs, 0 SdLazy, 143498 SolverSat, 16085 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64818.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16349 GetRequests, 5991 SyntacticMatches, 183 SemanticMatches, 10175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65566 ImplicationChecksByTransitivity, 157431.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3946occurred in iteration=274, InterpolantAutomatonStates: 8675, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7400.8ms AutomataMinimizationTime, 432 MinimizatonAttempts, 90149 StatesRemovedByMinimization, 429 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1217.1ms SsaConstructionTime, 4318.3ms SatisfiabilityAnalysisTime, 556452.3ms InterpolantComputationTime, 16044 NumberOfCodeBlocks, 16044 NumberOfCodeBlocksAsserted, 1732 NumberOfCheckSat, 15184 ConstructedInterpolants, 4 QuantifiedInterpolants, 149037 SizeOfPredicates, 589 NumberOfNonLiveVariables, 31868 ConjunctsInSsa, 10354 ConjunctsInUnsatCore, 860 InterpolantComputations, 4 PerfectInterpolantSequences, 5304/25921 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown